We have found reputed ad networks to be generally safe and
not propagating malicious content. Mobclix was one example
where we saw a few scams, although Mobclix itself may not
be aware of them. In this section, we will discuss how even
Google’s ad network appears to be not free from malicious
content. Google ads is the most popular ad network (we
consider both Doubleclick and Admob under one umbrella
of Google ads), being included in over 40% applications while
all other ad libraries are included in less than 10% applications