PDFResurrect is a tool aimed at analyzing PDF
documents. The PDF format allows for previous
document changes to be retained in a more recent
version of the document, thereby creating a
running history of changes for the document. This
tool attempts to extract all previous versions
while also producing a summary of changes between
versions. It can also "scrub" or write data over
the original instances of PDF objects that have
been modified or deleted, in an effort to disguise
information from previous versions that might not
be intended for anyone else to read.
