I ordered a paket of shoes from an online shop. Now I want to send them back and the online shop uses an automatic postage stamp provided by DHL.

[caption id=“attachment_70” align=“alignleft” width=“300” caption=“The yellow fields in the top right corner are buttons which trigger a”][/caption]

You can download a PDF, which can only be opened by Adobe Acrobat or any PDF reader who understands Javascript. What you don’t expect, are Javascript buttons in the upper right corner, which actually start a print job. I mean, you’re looking at a document with a reader, not an application to start print jobs. That’s why the ‘print’ button of the reader application is for. Isn’t it?

So, all of a sudden, I clicked randomly in the PDF to get rid of the stupid ‘Muster’ letters, which make it difficult to see the actual postage stamp. After I closed the reader, I noticed that there happened something. The printer was already printing like hell and the terminal showed me the following debug output:

Auftrags-ID ist milhouse-107 (1 Dateien) Auftrags-ID ist milhouse-108 (1 Dateien) Auftrags-ID ist milhouse-109 (1 Dateien) Auftrags-ID ist milhouse-110 (1 Dateien) Auftrags-ID ist milhouse-111 (1 Dateien)