Can I create an Intranet Search with Sitefinity?
It would be searched for Office docs(.docx, .doc, .xls, .xlsx, .ppt, .pptx), pdfs, .aspx pages, images.
Creating new search indexes is fairly straightforward. Here's some documentation on how to do it.
It doesn't look like it supports all the formats you're looking for but...there are quite a few!
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