Can you tell the difference between the two ads below?
Advertisement A Advertisement B
They may appear to be identical, but actually, they are far from it. Advertisement A is a perfectly legitimate ad, while Advertisement B contains malware.
Advertisement B is an example of malvertising, or malicious advertising. Malvertising is a hack cybercriminals use to spread malware via online advertisements. As you can see, malvertisements are deceiving and the damage can go beyond your website by infecting your computer with malware.