Malicious PDF — malware analysis report

Static analysis result for SHA-256 92539d91cc1d147f…

MALICIOUS

PDF

43.0 KB Authoring application: Scribus
MD5: 03ba8d6f06fb7ba9f4ca68cda87dbed3 SHA-1: d9b151da67de4e74ceddb9f4bb0601ceafabd2cd SHA-256: 92539d91cc1d147f5cc7b71b7c7afdcc365b280afc4127934993e3c961763630
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The embedded URLs likely serve to redirect users to malicious sites or download further payloads. The document body text, though partially corrupted, discusses management approaches, which is likely a lure to disguise the malicious link distribution.

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://www.mulberrystreetrecords.com/uploads/1/3/0/7/130739949/789e8.pdf
    • http://ecolevandyke.com/uploads/1/3/0/8/130814666/zekizat.pdf
    • http://californiaconnecting.org/uploads/1/3/0/7/130775199/jikixodawi.pdf
    • http://twyfi.org/uploads/1/3/0/7/130739978/linax.pdf
    • http://nakomahomesandland.com/uploads/1/3/0/7/130776500/9963009.pdf
    • http://www.dmusdinnovation.org/uploads/1/3/0/6/130620389/3f6eb6bc06d94.pdf
    • http://barnfreshcycles.com/uploads/1/3/0/7/130739200/ximad.pdf
    • http://bhspaws.com/uploads/1/3/0/5/130540604/4497521.pdf
    • http://commonreaders.info/uploads/1/3/0/4/130483956/e3c8096a31df.pdf
    • http://www.azfairhousing.org/uploads/1/3/0/6/130640078/8969264.pdf
    • http://kghaccountingservices.com/uploads/1/3/0/5/130544672/b8a3809d79ea.pdf
    • http://dawsonspringsha.com/uploads/1/3/0/6/130620628/donuni.pdf
    • http://webdisk.t2troubleshooting.com/uploads/1/3/0/8/130874429/130874429.html#top+down+vs+bottom+up+approach+in+nanotechnology

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c9.bin
79c8482131176a097d44d8845d606e67d414dadbcda700de919125e55d8c4ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C9 7648 bytes

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