curl -o sample-8mb.pdf https://file-examples.com/storage/fe8c7e0e0f2a23c1acd7f3c/2017/10/sample-pdf-8mb.pdf
Unlike random binary files, a true PDF sample should be readable and structurally valid. A proper 8MB sample PDF download will have the following characteristics: 8mb sample pdf file download
Visit file-examples.com and select the 8 MB option, or use curl : curl -o sample-8mb