Sorry to disappoint you, but there's a big chance that you do have something malicious on your website.
WOT isn't going to help you, because it's ran by people like you and me that vote sites over time. If your site was just infected today, I'm sure WOT users won't start saying that your site is bad yet.
Now that I have that explanation over with, let's get down to the details.
We can't tell whether or not your blog is infected, or offer help until we know what the address is.
put a link in a post, but disable it. For example, if your site was
http://www.google.com, post it like this hXXp://www.google.com to keep it disabled.
Then, we'll take a look at the code on your site and tell you if it's infected or not.
Like it or not, sites get hacked quite often. Yours may have just been the next target...