It appears as though the pharmaceutical spammers are now exploiting Google Adwords as their new redirect of choice. What an interesting way to make money for them, not old do they get some suckers credit cards details and sell them some fake drugs they can also rip-off Google as well.
Example of Adwords URL:URL is modified from original to prevent functional link
http://google.co.uk//pagead/iclk?sa=l&ai=polis&num=3449123&adurl=http://example.com
Also using the old method the following new phrase has been sited and added:
注册成功boyhad
Please see original article for details regarding this and why you have received an email that has brought you to this site.