Some more information:
I downloaded the same book using ADE and compared both files. As a result both are nearly identical. The ADE file has a 11 line trailer containing
Quote:
6891 0 obj
<</EBX_PUBLISHER(some text)/Filter/E...
endobj
xref
6891 1
0011111111 00000 n
trailer
<</Root 1 0 R/Info 5 0 R/Encrypt 6891 0 R/ID[<...
startxref
11111111
%%EOF
|