The file that is forwarded typically contains some sort of payload designed to make the final server do something that the attacker wants it to do.

被转发的文件通常包含某些代码，其目的是在最终服务器上完成攻击者希望做的事情。

youdao

Nasa is hoping the payload inside Endeavour for its final mission will deliver equally astonishing science.

BBC: Shuttle Endeavour launches one last time