Short text data, yes. PDFs or images, no. The narrow bandwidths available in the high-frequency bands don't allow high bit rates. Your home internet connection is probably at least 1 megabit per second. HF digital bit rates are 8-45 bits per second. No, I didn't leave out the "mega" or even "kilo" before "bits".
There are faster modes, but they use acknowledgement by the recipient and retransmission (if necessary) for each data packet. This isn't suited for a broadcast.
The ARRL already does broadcasts like this:
hopefully it can be improved upon
my download speed is 19.95 Mbps and upload is 20.71 Mpbs
for the record