Malware coming in the form of attachments is not unusual these days.
However, malware can also be found in links provided within e-mails:
According to its name, “You have won!.pdf”, it suggests to people that they have won some kind of a lottery. However, the URLs lead you to a malicious file, which seems to have been taken down (access to which is already blocked by Sophos’s web appliance).
So, please beware of such malicious links and their fake claims that you have won some money ;-).
If you are curious of what you did win, you can always click on the link and win yourself a piece of malware ;-).