How are you converting your ascii search term into binary? Sounds dubious to me. Anyway, I imagine the text in a PDF is encoded in some way (compression?), otherwise you'd be able to see it if you opened the PDF in a text editor (I havn't actually tired this, maybe you can, like with Word docs, if so you could use FSO and search on the string as normal). Sadly I think you might need to get a PDF component like the one advertised on the left.