Yes, the photo on the left is the original. It was taken by a staff photographer at the Miami Herald and is available for license from Getty Images:
San Francisco 49ers outside linebacker Eli Harold and quarterback... News Photo - Getty Images
I agree that it looks like it was scanned, but I don't know why anybody would scan a hardcopy of anything for an email ad. And they just happened to have a hardcopy of a photo of a photo of Kap that was taken 2.5 years ago? That strikes me as rather implausible.
Either way, Miami Herald says that they didn't give permission for the photo to be modified; NRCC says that they got the image from a graphic design firm:
https://www.miamiherald.com/news/politics-government/national-politics/article232550702.html
Note that this image is not "royalty free", but rather is "rights-managed". It's also "not released", which means that Kap hasn't granted permission for his image to be used. Since this is clearly a commercial usage, it would require both a custom pricing quote from Getty and a release from Kap (or the NFL or whomever manages that sort of thing on his end).
What is a Release? | Getty Images Canada
Getty Images