Something is opening Spam URL in my Browser, how do I find out what did this? Sometimes, when using my phone, suddenly my browser (Google Chrome) opens up and tries to open a Spam URL. This will occur again and again, until I restart the phone.

It does not seem to be related with the app I am using at that specific moment, and it keeps happening even if I kill all running apps.

Now I wonder: Is there a way to find out what is making my browser open this URL? Is this logged somewhere, or can this be logged somehow?

Android Version is 5.0.1, device is a Samsung Galaxy S4.
If you use android studio, you can connect your phone and enable usb debugging, then simply filter the LOGCAT for "http://" and find your culprit.

Here's a URL on DDMS:

http://developer.android.com/tools/debugging/ddms.html