Zafi.D and Atak.H keep spreading, posing as Christmas cards. We've seen this many times before. With for example the Maldal and Navidad viruses.

As an example, Maldal was sending fake Christmas cards looking like this during Christmas 2001:



And some of the readers might even remember Happy99, arguably the first email massmailer ever. It posed as a Happy New Year greeting card:



Our advice: steer away from electronic greeting cards. Go for the traditional pen-and-paper ones...