I have never seen this robot before, and hope never to see it again.
IP: 128.220.117.abc
UA: Mozilla/5.0 (compatible; Paracrawl; +http://statmt.org/paracrawl/robots.html)
robots.txt: asks but disregards
The URL in the UA first redirects to HTTPS and then gives a resounding 404. The hostname itself exists, and could be legit, but has no contact information.
The IP (full /16) appears to belong to Johns Hopkins, so I fired off a displeased email to noc@etcetera, but do not expect to hear back on a weekend--if ever.
I do not know if the robot would have slunk away dejected if it had found its name in robots.txt. I do know that it asked for every html and pdf file on the site, including the entire contents of roboted-out directories. (From this I learn that my site has approximately 725 pages. I also learned--ahem, cough-cough--that one obscure interior page still has a link to a page I moved almost a year ago. Oops.)