This is of particular concern because the Acrobat Reader program “lives” on the user’s computer, not on the visited web site.
In the past, for one to generate an attack like this, there would first have to be a flaw in a web site. Then, the bad guy would have to find that flaw and try to direct unsuspecting users to that flawed web site. But now, the process is greatly simplified because the flaw is in a program that resides on millions of individual computers.
So, here are some ways to protect yourself:
Switch to Brava! PDF reader. This is the one that I use for several reasons and now I have one more reason ;).