Smallpdf.com affiliated with Pdfmaster.net is a potentially unwanted program designed in Switzerland. Despite different useful functions, it may be classified as a potentially unwanted program. It's because Smallpdf.com has own extension, which collects users personal data for commercial purposes. It leads to increasing promotional materials in search results, permanent redirecting of users browser to the sites with the great number of ads, and also to sharing of users personal data to Smallpdf.com commercial partners
Search.htheweathercenter.co is a browser hijacker that changes the settings of Chrome, Edge, Mozilla, IE and other browsers that are available on your system. According to the developers, this search engine is designed for quick access to popular weather forecast resources, and also has useful buttons for quick access to Amazon, Google's mailboxes and Yahoo and other popular sites and social pages.
If you notice that the search engine and homepage of your webservers have been changed to Safesearchprotect.com, then most likely your computer is infected with a Safesearchprotect.com browser hijacker. As mentioned above, this changes the settings of Chrome, IE, Mozilla and other browsers installed in your Windows. Outwardly it looks like a legitimate search engine, similar to Searchincognito.me described earlier.
Developers position Searchincognito.me as a legitimate search engine with the ability to search in incognito mode. In addition, they argue that their search engine has the usual functions of similar search pages, such as Google, Yahoo, Bing, and others, namely it increases the experience of browsing, searches efficiency and so on. Externally, too, Searchincognito.me does not cause any suspicion and seems familiar.
Simplysafesearch.com is potentially unwanted software, namely a browser hijacker, changing Google Chrome, Internet Explorer, Edge and other browsers in your OS. First of all, it sets http://simplysafesearch.com/ as a homepage and search engine by default, which looks quite legitimate.