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From: astral on 22 Jun 2010 06:35
what's encoding used in this code:

%PDF-1.5
%�?<�
1 0 obj<</T#79p#65/#43at#61#6c#6f#67/O#75#74#6c#69n#65s 2 0 R/Pa#67e#73 3 0
R/Op#65n#41#63#74#69o#6e 5 0 R>>endobj
2 0 obj<</#54ype/O#75tl#69#6ee#73/C#6f#75n#74 0>>endobj
3 0 obj<</Type/#50ag#65#73/K#69ds[4 0 R]/Co#75#6e#74 1>>endobj
4 0 obj<</#54#79#70e/Pag#65/Pa#72e#6et 3 0 R/M#65#64i#61B#6fx[0 0 612
792]>>endobj
5 0 obj<</#54ype/#41cti#6fn/S/#4a#61#76a#53cr#69p#74/JS 6 0 R>>endobj
6 0 obj<</L#65#6egt#68
2709/#46#69l#74#65#72[/#46#6cat#65#44#65#63ode/#41SC#49IHe#78#44ecod#65]>>
stream

is this javascript encoded?

From: rossum on 22 Jun 2010 11:33
On Tue, 22 Jun 2010 13:35:06 +0300, "astral"
<astral(a)news.eternal-september.org> wrote:

>what's encoding used in this code:
>
>%PDF-1.5
>%Ë?<ø
>1 0 obj<</T#79p#65/#43at#61#6c#6f#67/O#75#74#6c#69n#65s 2 0 R/Pa#67e#73 3 0
>R/Op#65n#41#63#74#69o#6e 5 0 R>>endobj
>2 0 obj<</#54ype/O#75tl#69#6ee#73/C#6f#75n#74 0>>endobj
>3 0 obj<</Type/#50ag#65#73/K#69ds[4 0 R]/Co#75#6e#74 1>>endobj
>4 0 obj<</#54#79#70e/Pag#65/Pa#72e#6et 3 0 R/M#65#64i#61B#6fx[0 0 612
>792]>>endobj
>5 0 obj<</#54ype/#41cti#6fn/S/#4a#61#76a#53cr#69p#74/JS 6 0 R>>endobj
>6 0 obj<</L#65#6egt#68
>2709/#46#69l#74#65#72[/#46#6cat#65#44#65#63ode/#41SC#49IHe#78#44ecod#65]>>
>stream
>
>is this javascript encoded?
Every hash indicates that the two following characters are hex digits.
The hex number appears to be ASCII from what little checking I have
done. Other characters appear to be unchanged from the plaintext.

Hence: "T#79p#65" -> "Type" as #79 -> 0x79 -> 'y' and #65 -> 'e'

rossum

From: Robert Kochem on 22 Jun 2010 13:52
astral wrote:

> %PDF-1.5
> [..]
> is this javascript encoded?

Take a very close look on the first line. You are looking onto a PDF file.
Details on the format of PDF files can be found here:

http://www.adobe.com/devnet/pdf/pdf_reference.html
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