[3]Well, stop looking!
Use the right tool for the job:
http://www.pdf-search-engine.com/ [4]
Links:
[1] http://pulse.veltsos.com/category/it/general
[2] http://pulse.veltsos.com/category/it/search
[3] http://linux.philosweb.com/drupal5/files/image_2_41.png
[4] http://www.pdf-search-engine.com/