What is PDFPros?The Malwarebytes research team has determined that PDFPros is a search hijacker. These so-called "hijackers" manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice.This particular one is a search hijacker and uses web push notifications.How do I know if my computer is affected by PDFPros?You may see this entry in your list of installed Chrome extensions:and these warnings during install:You will see this icon in your Chrome menu-bar:and these changed settings:How did PDFPros get on