So let me walk anyone interested through the simple analysis that shows how the document was created.
First of all, you can take a simple tool called pdfimages to extract the bitmaps and jpeg in the PDF. But to make sure that it does not create its own artifacts, you can also use pdf-parser.py to look at the jpeg object. Both contain a JPEG comment string "YCbCr".
The only software/hardware combination so far which produces this strings is a Xerox Workcentre. Not surprisingly the workcentre also uses Mixed Raster Compression and JBIG2 compression and generates the same layers as found in the whitehouse PDF.
Most if not all artifacts can be explained by this simple workflow. I would be more than happy to answer any questions and provide further evidence.
The bleeding through of the color behind the actual text is shown to be a jpeg artifact as had already been outlined by a poster named gsgs. The layers align on two sides on 8 bit boundaries, again a workflow artifact. The images are rotated, again part of the Xerox workcentre workflow. The text is double the resolution of the background: again a Xerox workcentre workflow. There is a masking layer, again part of edge erase, found on a xerox workcentre.
Any other questions? Read the full story
here
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and the monochrome bitmap layers
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Signature block
Stamp 1
Stamp 2
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