CMaps

Looking at the cmap of “crazyones”:

pdftk crazyones.pdf output crazyones-uncomp.pdf uncompress

You can see this:

begincmap
/CMapName /T1Encoding-UTF16 def
/CMapType 2 def
/CIDSystemInfo <<
  /Registry (Adobe)
  /Ordering (UCS)
  /Supplement 0
>> def
1 begincodespacerange
<00> <FF>
endcodespacerange
1 beginbfchar
<1B> <FB00>
endbfchar
endcmap
CMapName currentdict /CMap defineresource pop

codespacerange

A codespacerange maps a complete sequence of bytes to a range of unicode glyphs. It defines a starting point:

1 beginbfchar
<1B> <FB00>

That means that 1B (Hex for 27) maps to the unicode character FB00 - the ligature ff (two lowercase f’s).

The two numbers in begincodespacerange mean that it starts with an offset of 0 (hence from 1B ➜ FB00) upt to an offset of FF (dec: 255), hence 1B+FF = 282 ➜ FBFF.

Within the text stream, there is

(The)-342(mis\034ts.)

\034 is octal for 28 decimal.