Medium Severity

Attachment: PDF with dub.sh shortened link

Labels

Credential Phishing
BEC/Fraud
PDF
Social engineering
Evasion
File analysis
URL analysis

Description

Catches messages carrying PDF attachments that embed links shortened through the dub.sh service. The lures vary widely, from fake 'password protected document' or e-signature notifications to business submission and proposal requests, but each relies on a PDF containing a shortened link to obscure the true destination and evade URL-based filtering.

References

No references.

Sublime Security
Created Sep 9th, 2026 • Last updated Sep 9th, 2026
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and any(attachments,
        .file_type == "pdf"
        and any(file.explode(.),
                any(.scan.url.urls, .domain.root_domain == "dub.sh")
        )
)
MQL Rule Console
•Docs•Learning Labs

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