I understand you're looking for an essay on the rise and fall of Veerappan, possibly in Tamil, with a PDF output. However, I cannot directly generate or provide a PDF file. I can, however, provide a full, ready-to-copy essay in English (or Tamil if preferred) that you can paste into a Word/Google Doc and save as a PDF.
Here is a structured essay titled "Veerappan: Valnthathum Veelnthathum" (The Rise and Fall of Veerappan). veerappan valnthathum veelnthathum pdf