Immediately after the first ad is a video ad. Each time, the start of ads is signified by a charm sounding on the mobile device. This time it is a video ad.Ġ8-22 15:05:34.927: I/ActivityManager(765): Displayed /: +555msĪfter the initial ads, they come more frequently. Before unlocking the screen, I checked my LogCat logs.Ġ8-22 15:04:55.348: I/ActivityManager(765): START u0 from uid 10277 My expectation from previous testing is that it takes longer before an ad displays. To my surprise, at 15:04 I heard my test phone sound a charm. Thus, my waiting game begins the morning of August 22 nd. I then installed PDF reader - documents viewer, package name, directly from Google Play. Among other tools, Android Device Monitor includes LogCat which logs all activity on an Android mobile device. With this in mind, I plugged my test phone into my laptop with Android Device Monitor running. For example, full screen ads displaying immediately after install would likely result in quick a uninstall. This long delay is in order to make it harder to track down which app is causing the ads. It takes a couple of hours before the PDF app will display ads. Catching the adwareĬatching this adware in real time is a game of install and wait. More specifically, the reader is known as PDF reader - documents viewer, package name . As a result, this aggressive behavior lands it in the realm of adware. A PDF reader found on Google Play with over one million downloads is aggressively displaying full screen ads, even when the app is not in use.

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