Malicious PDF — malware analysis report

Static analysis result for SHA-256 911c33e0963e86d5…

MALICIOUS

PDF

34.6 KB Authoring application: LibreOffice Draw
MD5: c4e9921a32468100824da531c1106d49 SHA-1: 7704de92cdb8b6da593325d62314878f75466e84 SHA-256: 911c33e0963e86d5a43e06d8a4640cb5cd367dfbb92ff9feefcb371e5710e62f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or distribution mechanism. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious intent, likely related to phishing or traffic redirection. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://venoja.gictorin.ru/uploads/2020/01/28/9396447.pdf
    • http://seattlebreastfeedinghikes.com/uploads/1/3/0/5/130550744/d83296d1f54d2e.pdf
    • http://ashtoninsuranceagents.com/uploads/1/3/0/6/130621451/raredekibovatipoj.pdf
    • http://repuw.smileshop10.ru/uploads/2020/01/28/32ba5240.pdf
    • http://lilubeauty.com/uploads/1/3/0/2/130270982/logiditili_salimoko.pdf
    • http://kuhni-msc13.icu/uploads/2020/01/28/5485f48fc0e8d7b.pdf
    • http://applepickndays.com/uploads/1/3/0/5/130547884/77b8f2ce1b3cc3c.pdf
    • https://gosuwatufojeja.weebly.com/uploads/1/3/0/5/130550782/donabaxak.pdf
    • http://tcsonline.net/uploads/1/3/0/2/130288383/130288383.html#achyutam+keshavam+krishna+damodaram+krishna+bhajan

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000118c.bin
0c8d0d441305ba3a6219d3d77b1a69428d724f31c10626bf12beecfbb61f18d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C 7532 bytes
font_01_sfnt_off00003fea.bin
21fbb401bacf5001f6256ab2fc2113d2282a0aad1490ad107bb5c0f5559be8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FEA 7952 bytes

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