It looks like my blog just got hacked. All traffic was redirected to distributioncorporate.ru with some custom rules in the .htaccess file. Make sure to delete these files:

/wp-content/uploads/_wp_cache.php
/wp-content/uploads/sm3.php

I also deleted the Mobile Detector Plugin, which also contained some strange PHP files and may be the cause of this. Check these links for more info: http://wordpress.org/support/topic/site-getting-diverted-from-google?replies=12 http://markmaunder.com/