Hmmm let me look for one called "virus". Oh wait which developer would be stupid enough to make an app called virus instead of just put one in it. If you like i can link you 10 articles about virus' in apps on the play store. Furthermore http://ziklagsystems.wordpress.com/...bad-android-apps-downloaded-from-google-play/
Seriously the quality of apps is absolute rubbish on the play store. Probably only half of them are at the same quality of IOS apps.
Eh....not a big deal. Yeah there are Apps that put ad icons on your phone and thats annoying but there is 6 in that article that said are bad.
Androids 4.2 software has a built in virus and malware detection built in it and they are catching the things you linked. Not like iTunes hasnt had any issues.
IMO what you posted isnt anything to speak of. You said it was loaded with viruses. It isnt. If you pay attention to what is said about the apps in there, you shouldnt have an issue. Unfortunately, most people are too lazy to read a small paragraph.