Malicious PDF — malware analysis report

Static analysis result for SHA-256 a741f4d542460dee…

MALICIOUS

PDF

38.6 KB Authoring application: Smallpdf Desktop
MD5: fa6a835a1825f47febdb26b6c3fdee3f SHA-1: 930818b738d195ad49d3b879521cdd76ee1a32c8 SHA-256: a741f4d542460deeb9055aed2723353ed36d492e3aad56af5ce1ee0e178bc544
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to redirect users to phishing sites or to distribute further malware, aligning with a phishing or SEO-based distribution attack pattern.

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://makeupbyshandre.com/uploads/1/3/0/4/130476880/midus_nubodovesegotax_delanazefad_kotonoj.pdf
    • http://neneliciouslingerie.com/uploads/1/3/0/5/130539763/1af3d413027a58.pdf
    • http://donmcqueenart.com/uploads/1/3/0/5/130551143/1dd46.pdf
    • http://plasticwrapballgame.com/uploads/1/3/0/3/130312924/reluzojijak.pdf
    • http://nsucc.com/uploads/1/3/0/7/130776330/mibinufejezo.pdf
    • http://mylenetessier.com/uploads/1/3/0/4/130436007/5590003.pdf
    • http://kayleighjbarber.com/uploads/1/3/0/5/130543121/6233338.pdf
    • http://stcolumbanusalumni.org/uploads/1/3/0/5/130589159/7375869.pdf
    • http://northernrailleaders.com/uploads/1/3/0/7/130739593/130739593.html#bootstrap+dashboard+template+for+wordpress

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cc.bin
13e5a199a6d8930c36837be8ffae5724a9ae9aa9b4ccc3d98869cac60f2f2b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC 8708 bytes

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