If you find information in Google's search results that you believe result from spam, paid links or malware, here's how you can report it:
SPAM - https://www.google.com/webmasters/tools/spamreport
If the site is spam, tell us about it! Google takes spam extremely
seriously, and investigates reported instances. These reports are
submitted directly to our webspam team and are used to devise scalable
solutions to fight spam.
PAID LINKS - https://www.google.com/webmasters/tools/paidlinks?pli=1
Buying or selling links that pass PageRank can dilute the quality of
search results. Participating in link schemes violates the Googles
Webmaster Guidelines and can negatively impact a site's ranking in
search results. If you believe a site is engaged in buying or selling
links that pass PageRank, please tell us about it.
MALWARE - http://www.google.com/safebrowsing/report_badware/
If you believe the site is infected with malware or malicious
software, please report it to us so we can take action as necessary.
BONUS: copy/paste this into the search box and the first result should be valid:
"The Personal MBA: Master the Art of Business" ext:pdf .pdf
not sure if this is actually what you seek: link to pdf