Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfb2ef628289e72…

MALICIOUS

PDF

34.8 KB Authoring application: pstoedit
MD5: 346af330eaac2bea40efba24278816a1 SHA-1: ea06d9dbf0ead38f4388d56b476ed5c47a83a687 SHA-256: 1bfb2ef628289e72a69d26045f755b39ec9d83e0b7115a114457154cc6e953f1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document contains a large number of embedded URLs, suggesting a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://motoringlegaladvice.com/uploads/1/3/0/5/130590229/todivo.pdf
    • http://tarigolaw.com/uploads/1/3/0/2/130291493/xulikerad.pdf
    • http://kekavasu.shortcutviralnews.com/uploads/2020/01/29/gutaf.pdf
    • http://shopofficeglam.com/uploads/1/3/0/6/130621950/xodavuwokuweripaj.pdf
    • http://semipa.ceodentvicalvaro.com/uploads/2020/01/28/kawifaxexerejoz.pdf
    • http://ladieslearnenglish.com/uploads/1/3/0/5/130550790/da48ad9d586.pdf
    • http://fomop.paypal-limitted.com/uploads/2020/01/28/2023980.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/4/130489122/130489122.html#multiplying+polynomials+expressions+by+monomials+worksheet+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001177.bin
1e67d5543ae99ad3c0334344261c43b231e30f54813ff1c9827d8e32547c26e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177 8076 bytes

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