If you want to actually understand the content rather than just collect the file, a "better" approach for many students is:

Many available PDFs are simply the Arabic text scraped into automated translation software. Because al-Buni wrote in highly complex, classical Arabic filled with dense spiritual metaphors and rhyming prose, machine translations yield incomprehensible gibberish.

If you search online for "Shams al Maarif English PDF," you will likely find documents circulating on esoteric forums and file-sharing sites.

There is no legal full English PDF. However, the of the opening sections comes from: