![]() It is only when the ads start displaying outside the app at random that this qualifies as adware. Moreover, Ad SDK’s like Applovin and Facebook Ads are necessary to keep apps free on the Play Store. Any of these ads within the app, whiling using the app, is fair game. The issue is displaying ads where they ought not to be displayed. In addition, it uses an in-house Ad SDK contained in .ads.PPMActivity. Although the use of these common Ad SDKs is shown displaying ads, it is not necessarily their fault. Facebook Ads is shown in the log above, but we also observed it using Applovin along with others. PDF reader uses an array of common Ad SDKs and its own Ad SDK. ![]() 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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