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Thanks guys! I think I'll approach it with the DMCA side first. I was reading the disavow tool should be a last ditch effort. This is a portfolio that I really don't want any traffic to and it is essentially content scraping for all intensive purposes, they are just putting the PDFs in a viewer rather than posting the actual content to the pages. I also suspect it's some sort of network of sites because they've all popped up recently and they're all using the same documents. There's literally no need to drive traffic to this part of my site, it's a portfolio for clients only.

I downloaded my links through the Google Webmaster site and I have a number of new links that appear to be coming from document download sites. They have basically taken my PDFs and have them to where they can be downloaded. They are also linking back to my site and creating what I feel are sketchy links. I don't actually want traffic coming to these PDFs. They are basically sample articles for my writing company and it's just a portfolio.

Here's one of the links:

http://www.give-me-doc.com/Trailer-Brake-Types.pdf

So, what or can I do about them? Should I disavow them?

Any suggestions would be appreciated.

Thanks,
Valerie