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:
1 2 | /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