Random daemons running amok and using 100% CPU is a tale as old as Mac OS X. I've encountered them from time to time on every Mac I've had since I first installed 10.1 "Puma" on my lime green iMac DV in 2001. Sometimes you can just kill it and it'll stay dead, other times it'll respawn and continue its misbehavior. Sometimes a restart will permanently fix it, other times it'll happen occasionally until it just doesn't anymore. Often there are people asking about it on forums like this post, but rarely does anyone have any insight into what's going on.