Malware warning on URL formed by category – ???

I recently signed up for Manage WP and used their security scan on one of my blogs. It came up with two malware warnings, but they are on pages that are formed by following a category. This is what the warnings say:

Security warning in the URL: http://mymobileadventures.com/category/florida-master-naturalist-program
*Known Spam detected. Details: http://sucuri.net/malware/entry/MW:SPAM:SEO <br/
Security warning in the URL (for Google’s UA): http://mymobileadventures.com/category/the-estero-bay-aquatic-preserve
*Known Spam detected. Details: http://sucuri.net/malware/entry/MW:SPAM:SEO <br/

How does one go about removing malware from a page that doesn’t really exist until it’s assembled by clicking on the category? Any help appreciated!