What is app stack malware?

Regarding the app stack malware - Find the cause

If using "Jelly Bean", it is easy to know which app makes the push notification. Find out which app is pushing ads in my notification bar? Otherwise, use Addons Detector to find out which apps are using push notifications inappropriately. Though it needs manual inspection. Scan a malicious file with ALYac. It can catch commonly-seen malwares on Android.

Actions

• Never click on an unfamiliar notification message unless you know what it is.
  
• You are suggested to remove those suspicious apps that misuse push notifications.
  
• If AirPush is detected, you can opt-out by using the Airpush opt out app once.
  

Note: The Simplified Chinese stated "Baidu Browser"