hi @isaac23 why you need to send the pdf as an attachment and not just send the link to download it?
I think you can download the PDF to your local and attach it but it could be a really inefficient way to work with.
There is an old question here but with s3 and the conclusion was download it locally and attach it or just send the link.
Take a look at: https://laracasts.com/discuss/channels/laravel/attaching-remote-files-which-are-stored-in-aws-s3-bucket-while-sending-an-email-in-laravel?page=1