Scam (?) email supposedly from a flat rental company

A week ago, I received a strange email with a PDF file provided by Adobe (see screenshot from my e-mail app search tool).

I did not open the PDF file since I'm paranoid, I just instantly deleted the email and reported it to my network administrator (the email came to my work email address). However, I thought I'd post the information here, asking if anyone has perhaps had a similar situation.

I no longer remember exactly what was in the email, but certainly something like ‘agreement is ready to review and sign’ or something like that.

What surprised me was that this email really existed after I googled it - is it possible for a scammer to use an existing email address?

By the way according to the email it's a US company and I live in Europe and have never been to the states, let alone rented a flat there....

I also reported it to phishing@adobe.com