DDD Files

Thanks, used the third link and dropped the file in the box. There's alot of script writing with broken English, halfway down it's showing me a set of mechanical instructions, i'm still none the wiser of what software was used to create the DDD file. Thank you for your help though.  

there are different ddd files.  

https://www.file-extension.info/format/ddd

https://www.trimbletl.com/glossary_term/ddd-file/

https://filext.com/file-extension/DDD

if you're sure you have an adobe distiller file, https://helpx.adobe.com/acrobat/using/creating-pdfs-acrobat-distiller.html