Facebook friend sending out ads via walls and chat?

[ruthipops]

I have a facebook friend, who I know in real life, who sent me a message on chat saying something like 'I'm making cash online easily! Go to ______' I forgot the address.
And then I got a message from him on my wall (I also checked a mutual friend and he had the same thing on his wall too) Saying
'hey I'm making crazy money online! take a look at CashOnlineEasy.com to see how you can start too! sot'

There are 3 different letters at the end of each wall post but the message is the same. I have removed this friend, but should I be worried? I'm doing a scan right now, I'm also wondering how my friend got this himself because he's not an idiot...

Thanks.