Method 'org.apache.pdfbox.io.Ascii85InputStream.read()' has bug when reading final set of char that are not modulo-4.
On page#0 there is a dictionary "323 0 obj << /Length 1492 /Filter [/Ascii85Decode /FlateDecode]>>"
Last set of bytes to decode is "%f" or 0x25, 0x66
Ascii85InputStream pads this to "%f~!!" and correctly generates the final byte 0x0f.
Including the '~' end-of-data char in the padding is a major bug.
If the final padding were "%f!!!", the final byte decoded would be 0x0e (which is wrong).
The correct padding is the 'u' char, or "%fuuu" (See http://en.wikipedia.org/wiki/Ascii85)
This is a quick fix.
The PDF files for corporate website "Grupo Bimbo" include lots of examples using Ascii85Decode/