System automate send pdf invoice on Complete order status. Complete status is setting in System -> Settings -> Your Store -> Option -> Complete Order Status:
Demo: http://codecanyon.net/item/send-pdf-invoice-via-email-on-order-complete/6049352
http://www.hotfiles.ro/download/sendpdf.rar/1405048
http://www.mirrorcreator.com/files/V6TIP1HK/sendpdf.rar_links
http://www40.zippyshare.com/v/3qsqdpsx/file.html
http://www.nowdownload.to/dl/ee8d94cd52dfa
http://downloads.ziddu.com/download/25031326/sendpdf.rar.html
https://userscloud.com/kij1vrqdezal
http://www.solidfiles.com/d/597704146c/
https://copy.com/EsDq8WDS0yL6EyED
http://www.mediafire.com/download/006701td7do5szy/sendpdf.rar
This file has UNTOUCHED status – (original developer code without any tampering done)