File2pcap

File2pcap is a tool which will create a pcap from any input file, simulating this file in transit, using various protocols and encodings. The resulting pcap file can then be used to create or test rules for Snort.

http://blog.talosintelligence.com/2017/05/file2pcap.html

https://github.com/Cisco-Talos/file2pcap/