This pdf by AGES Gaming is 13 pages long, 1 page front cover, 1 page editorial, 1 page ToC, 1 page SRD, 1 page back cover and some paragraphs of the sponsors. That leaves approximately 8 pages of content.
The pdf kicks off with three levels of hauntings and offer a staple of haunting-like things that happen in such areas. While they are ok, they suffer from being a bit generic – I wouldn’t have needed the pdf to make these modifications. I guess a novice GM who has never tried to feature a haunted location in his campaign might benefit from them, though.