SmartPDFConverterSearch may describe itself as offering a more convenient way to find suitable converter applications. However, its true purpose is to act as a browser hijacker and drive artificial traffic towards its sponsored address. Most browser hijacker applications similar to SmartPDFConverterSearch are distributed through deceptive marketing practices such as 'bundling.'
Computer users that want to use SmartPDFConverterSearch will find that upon installing the application, they have lost control over their browser. More specifically, the homepage, new page tab, and the default search engine will all be changed to open the 'smartpdfconvertersearch.com' address. The result of this is that every time the browser is simply opened, the users start a new tab or conducts a search, they will be generating traffic for the promoted fake search engine. And smartpdfconvertersearch.com is indeed fake as it cannot generate any search results on its own. Instead, it takes the user's search query and redirects it through a legitimate search engine - search.yahoo.com.
It is not recommended to keep SmartPDFConverterSearch on your computer even if you find some of its features as useful. Apart from the application preventing the change of the browser settings, it also could be monitoring and harvesting various data from the user. In most cases, browser hijackers are capable of tracking information that includes search history, visited websites, clicked URLs, IP addresses, geolocation and Internet provider.