I don't know why hackers and cyber criminals are only after Android and Google play. The news of Stagefright virus is still hot, now comes another serious malware threat to Google Play and Android. Here even if you do not download apps from untrusted sources, there is no escape. Ghost Push, a Trojan-style malware has managed to creep into the Google Play and hide itself inside applications. As per report it's supposed to affect 90k Android devices. The malware obtains root access and installs malicious apps and send never ending ads on your device.
This is another blow to Android's rising popularity.