我没有测试过这个包但是 node-exiftool 似乎提供了 pdf 元数据版本.

I have not tested this package but node-exiftool seems to provide pdf metadata edition.

另一种可能性是使用 pdftk(如果可用)和 child_process 编写您自己的模块.
也许我会尝试自己制作一个.

Another possibility is to write your own module with use of pdftk (if available) and child_process.
Maybe I will try to make one myself.