This document could have come through a none web source. Have you ever sent this report to another person? There are several of my reports online appearing as attachments to other people trees. Since my genealogy research on my families is not complete, I do not have any online trees or other online presence.
What you found is why I ALWAYS add my name and contact information to everything I share, it does not matter whether it is an original essay on one of my families or a report from Family Tree Marker. If I send something to someone and they post it to their tree, my name is posted with the information.
There is nothing in the PDF Document that could NOT have come from someone else's research including the citations which I believe are from an FTM template. Yes, the information is about your family, but can you prove that no one else has collected the same information and printed the report from their FTM?
I am not an expert on US copywrite law, but I believe that FACTS can not be covered under a copywrite. Relationship, names, dates, and place, are facts. Since the connecting text came from FTM and the only differences are FACTS, there is nothing to copywrite.
As I understand in reports like this, the only thing that could have been covered under a copywrite, are your personal essays about your family. These essays could be in separate files or included in FTM as notes. Again there are no notes in the document.
Finally I did a search for DocStoc, and found the following Wikipedia information.
https://en.wikipedia.org/wiki/Docstoc