This is a hack that makes your machine appear (to unix traceroute) to be anywhere on the internet. Specifically, you can define a route to append to the real route that any arbitrary host on the internet would see.
G. Ottoni, and B. Liu. 2021 IEEE/ACM International Symposium on Code Generation and Optimization (CGO), page 340-350. Los Alamitos, CA, USA, IEEE Computer Society, (March 2021)