Dissecting the PDF – 150 DPI JPEG/300 DPI Text

I have shown how an online PDF in Danish, shows a JPEG and multiple monochrome bitmaps. I have now determined that indeed the JPEG is encoded at 150 DPI and the text at 300 DPI.

Just like President Obama’s birth certificate. Another artifact bites the dust.

Let me show you Object 4 which contains the rendering instructions. The document was processed through preview using print to PDF:

 'q Q q 12 12 588 768 re W n 
           q 0 794.88 -614.4  0 613.2   -1.44 cm /Im1 Do Q 
 0.1373 sc q 0 605.28 -498.72 0 553.2  134.88 cm /Im2 Do Q 
 0.1765 sc q 0 30.24  -481.44 0 530.16  50.4  cm /Im3 Do Q 
 0.6 sc    q 0 204    -117.36 0 521.28 545.76 cm /Im4 Do Q 
 0.7412 sc q 0 112.08  -36    0 520.56 576.48 cm /Im5 Do Q Q'

/Im5
    /Width  467
    /Height 150 
/Im1
    /Width  1656
    /Height 1280

/Im1 is the JPEG, so take 1656 divide it by 794.88 and multiply by 72 DPI and you get 150 DPI

/Im5 is one of the monochrome bitmaps, so take 467 divide it by 112.08 and multiply it by 72 DPI and you 300 DPI

So now I have shown another feature, present in the Whitehouse PDF can be explained by our identified forger, “Xerox Workcentre 7655”.

In the original PDF, the rendering Object is Obj 5:

q 794.88 0.00 -0.00 614.40  -1.44 -1.20 cm            /XIPLAYER0 Do Q
q 605.28 0.00 -0.00 498.72 134.88 58.80 cm  0.1373 g  /XIPLAYER1 Do Q
q  30.24 0.00 -0.00 481.44  50.40 81.84 cm  0.1765 g  /XIPLAYER2 Do Q
q 204.00 0.00 -0.00 117.36 545.76 90.72 cm  0.60 g    /XIPLAYER3 Do Q
q 112.08 0.00 -0.00  36.00 576.48 91.44 cm  0.7412 g  /XIPLAYER4 Do Q'