How to uninstall the PDFSearchHD browser hijacker
Written by Tomas Meskauskas on (updated)
What is PDFSearchHD?
PDFSearchHD is a browser hijacker because it promotes a fake search engine (pdfsearchhd.com) by changing certain browser settings. It is also likely to collect browsing data. Note that browser hijackers are classified as potentially unwanted applications (PUAs), since users often download and install them inadvertently.
After installation, browser hijackers change setting such as the default search engine, homepage, and new tab to the address of fake search engines. PDFSearchHD changes them to pdfsearchhd.com. In this way, it forces users to visit pdfsearchhd.com when they enter search queries into the URL bar, or open a browser or new tab.
Note that pdfsearchhd.com redirects users to search.yahoo.com and simply displays results generated by the Yahoo search engine. Users cannot remove the address of the fake search engine from browser settings unless they first uninstall the browser hijacker that promotes it.
In this case, pdfsearchhd.com can be removed only when PDFSearchHD is uninstalled. Furthermore, browser hijackers are often designed to collect browsing-related data. For example, addresses of visited websites, entered search queries, IP addresses, and geolocations.
They can also collect private, sensitive information. The data is sold to third parties (potentially, cyber criminals) or misused to generate revenue in other ways. Therefore, browser hijackers that are installed on browsers and/or computers can cause problems relating to browsing safety, online privacy, and even identity theft.
| Name | PDFSearchHD |
| Threat Type | Browser Hijacker, Redirect, Search Hijacker, Toolbar, Unwanted New Tab. |
| Browser Extension(s) | PDFSearchHD |
| Supposed Functionality | Improved browsing experience. |
| Promoted URL | pdfsearchhd.com |
| Serving IP Address (pdfsearchhd.com) | 104.24.110.123 |
| Affected Browser Settings | Homepage, new tab URL, default search engine. |
| Symptoms | Manipulated Internet browser settings (homepage, default Internet search engine, new tab settings). Users are forced to visit the hijacker's website and search the Internet using their search engines. |
| Distribution methods | Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers. |
| Damage | Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
More examples of apps also classified as browser hijackers are Bolobi web, Spacerin and MixedFin. Most are designed only to generate revenue for the developers and are useless to regular users. Furthermore, these apps can cause serious issues. In any case, browser hijackers should never be downloaded or installed.
How did PDFSearchHD install on my computer?
Browser hijackers, adware-type apps, and other types of PUAs are commonly distributed by integrating them into the download and/or installation set-ups of other programs, so that a proportion of users inadvertently download and install them together with their chosen software. This distribution method is known as "bundling".
Offers to download and install additionally-included apps usually appear in "Advanced", "Custom" and other settings of the set-ups (where they can usually be declined). Many users fail to check and change these settings, thereby granting permission for PUAs to be downloaded and installed by default.
In addition, unwanted downloads and installations are sometimes caused by clicking deceptive advertisements capable of executing certain scripts.
How to avoid installation of potentially unwanted applications
You are advised to download files and programs from official websites and via direct download links.
Other tools and sources such as third party downloaders and installers, unofficial pages, and Peer-to-Peer networks (e.g., eMule, torrent clients) should not be used to download or install software. Check all "Custom", "Advanced" and other similar settings (or available checkboxes) for offers to download and/or install unwanted apps.
Do not click ads on dubious websites, since they can be designed to open bogus web pages or cause unwanted downloads and installations. Remove any unwanted, suspicious extensions, plug-ins and add-ons installed on the browser, and software of this kind from the operating system.
If your computer is already infected with PDFSearchHD, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this browser hijacker.
pdfsearchhd.com redirects to search.yahoo.com (GIF):
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner
By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.
Quick menu:
- What is PDFSearchHD?
- STEP 1. Uninstall PDFSearchHD application using Control Panel.
- STEP 2. Remove PDFSearchHD browser hijacker from Google Chrome.
- STEP 3. Remove pdfsearchhd.com homepage and default search engine from Mozilla Firefox.
- STEP 4. Remove pdfsearchhd.com redirect from Safari.
- STEP 5. Remove rogue plug-ins from Microsoft Edge.
- STEP 6. Remove pdfsearchhd.com redirect from Internet Explorer.
PDFSearchHD browser hijacker removal:
Windows 11 users:
Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.
Windows 10 users:
Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
macOS (OSX) users:
Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.
In the uninstall programs window: look for any recently installed suspicious applications (for example, "PDFSearchHD"), select these entries and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted applications that cause browser redirects to the pdfsearchhd.com website, scan your computer for any remaining unwanted components. To scan your computer, use recommended malware removal software.
PDFSearchHD browser hijacker removal from Internet browsers:
Video showing how to remove browser redirects:
Remove malicious extensions from Google Chrome:
Click the Chrome menu icon 
(at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate "PDFSearchHD" and other recently-installed suspicious browser add-ons, and remove them.
Change your homepage:
Click the Chrome menu icon (at the top right corner of Google Chrome), select "Settings". In the "On startup" section, disable "PDFSearchHD", look for a browser hijacker URL (hxxp://www.pdfsearchhd.com) below the “Open a specific or set of pages” option. If present, click on the three vertical dots icon and select “Remove”.
Change your default search engine:
To change your default search engine in Google Chrome: Click the Chrome menu icon (at the top right corner of Google Chrome), select "Settings", in the "Search engine" section, click "Manage search engines...", in the opened list look for "pdfsearchhd.com", when located click the three vertical dots near this URL and select "Remove from list".
Optional method:
If you continue to have problems with removal of the pdfsearchhd.com redirect, reset your Google Chrome browser settings. Click the Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plugins from Mozilla Firefox:
Click the Firefox menu 
(at the top right corner of the main window), select "Add-ons". Click on "Extensions" and remove "PDFSearchHD", as well as all other recently installed browser plug-ins.
Change your homepage:
To reset your homepage, click the Firefox menu (at the top right corner of the main window), then select "Options", in the opened window disable "PDFSearchHD", remove hxxp://pdfsearchhd.com and enter your preferred domain, which will open each time you start Mozilla Firefox.
Change your default search engine:
In the URL address bar, type about:config and press Enter.
Click "I'll be careful, I promise!".
In the search filter at the top, type: "extensionControlled"
Set both results to "false" by either double-clicking each entry or clicking the 
button.
Optional method:
Computer users who have problems with pdfsearchhd.com redirect removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active and click Safari menu, then select Preferences...
In the preferences window select the Extensions tab. Look for any recently installed suspicious extensions and uninstall them.
In the preferences window select General tab and make sure that your homepage is set to a preferred URL, if its altered by a browser hijacker - change it.
In the preferences window select Search tab and make sure that your preferred Internet search engine is selected.
Optional method:
Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...
In the opened window select all history and click the Clear History button.
Remove malicious extensions from Microsoft Edge:
Click the Edge menu icon 
(at the top right corner of Microsoft Edge), select "Extensions". Locate any recently-installed suspicious browser add-ons, and remove them.
Change your homepage and new tab settings:
Click the Edge menu icon (at the top right corner of Microsoft Edge), select "Settings". In the "On startup" section look for the name of the browser hijacker and click "Disable".
Change your default Internet search engine:
To change your default search engine in Microsoft Edge: Click the Edge menu icon (at the top right corner of Microsoft Edge), select "Privacy and services", scroll to bottom of the page and select "Address bar". In the "Search engines used in address bar" section look for the name of the unwanted Internet search engine, when located click the "Disable" button near it. Alternatively you can click on "Manage search engines", in the opened menu look for unwanted Internet search engine. Click on the puzzle icon 
near it and select "Disable".
Optional method:
If you continue to have problems with removal of the pdfsearchhd.com redirect, reset your Microsoft Edge browser settings. Click the Edge menu icon (at the top right corner of Microsoft Edge) and select Settings.
In the opened settings menu select Reset settings.
Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.
- If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon 
(at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently installed suspicious extensions, select these entries and click "Remove".
Change your homepage:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Internet Options", in the opened window remove hxxp://pdfsearchhd.com and enter your preferred domain, which will open each time you launch Internet Explorer. You can also enter about: blank to open a blank page when you start Internet Explorer.
Change your default search engine:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Manage Add-ons". In the opened window, select "Search Providers", set "Google", "Bing", or any other preferred search engine as your default and then remove "PDFSearchHD".
Optional method:
If you continue to have problems with removal of the pdfsearchhd.com redirect, reset your Internet Explorer settings to default.
Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.
Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Summary:
A browser hijacker is a type of adware infection that modifies Internet browser settings by assigning the homepage and default Internet search engine settings to some other (unwanted) website URL. Commonly, this type of adware infiltrates operating systems through free software downloads. If your download is managed by a download client, ensure that you decline offers to install advertised toolbars or applications that seek to change your homepage and default Internet search engine settings.
Post a comment:
If you have additional information on pdfsearchhd.com redirect or it's removal please share your knowledge in the comments section below.
Outstanding!
▼ Show Discussion