Looks like someone is trying to give the Storm Worm/Trojan a new lease of life.

Basically it arrives as spam with about 40 different titles.

The size of the spam run is staggering, said MX Logic in an e-mail alert Friday morning. "The MX Logic Threat Operations Center reports that it has received over 8 million of these messages, accounting for over 85% of its worm traffic over the past 24 hours," said the warning.
As usual, it relies on user intervention

More details here: