I've probably misunderstood, I thought you had a PDF and wanted to find out something about it. I don't know what AIF is but thought you could probably find something, with the "Browse Internal PDF Structure" option. This is an option in Acrobat.
Not at all sure this will help but Acrobat has a "Browse Internal PDF Structure" option, maybe you can find something in there to help.
Under View … Tools … Print Production there is a Preflight option (it should come up on the right of the Acrobat window). Select Preflight and then in the Options drop down (in the top right corner) select “Browse Internal PDF Structure”.
But, already the forms are in production environment, users are using it hence I don't have a chance to change them by insert any test scripting, pl. let us know any other alternative way, like, from menu or doing a right click on the saved offline form?