A new campaign of malicious photo apps on Google Play floods Android devices with random ads instead of functioning as advertised. They elude detection by making its icon disappear from the device home screen soon after it s downloaded. The apps in the campaign generally have a a three-stage payload evolution, researchers observed. They found that once the app is downloaded, it begins bombarding the device with ads, just appearing out of nowhere, a phenomenon known as delivering out of context (OOC) ads.
Source: https://threatpost.com/malicious-photo-app-campaign-google-play/157712/