PDFSearchz is a corrupted tool that installs as a browser extension or a program on targeted computers. This browser hijacker's main functionality is to redirect user searches through a fake search engine to generate advertising revenues for the malware operators.
As soon as a machine gets infected with PDFSearchz, the malware changes the browser's default search engine and homepage to feed.pdf-searchz.com. In consequence, the browser opens this unsafe URL each time the user launches it. Also, user search queries are always redirected through the malware's fake search engine, while a results page from a legit search engine is displayed, usually from Yahoo Search.
PDFSearchz spreads through infected advertisements, however, another proven method of distributions is "bundling" – developers embed undesired tools within the installers of popular freeware. Regardless of how PDFSearchz has found its way into your computer, you should delete it immediately. Browser hijackers not only redirect you to potentially harmful websites where you can get infected with additional malware, but many of them can also collect data, which can lead to significant privacy issues.