Malicious PDF — malware analysis report

Static analysis result for SHA-256 3055211c8b1fa847…

MALICIOUS

PDF

35.4 KB Authoring application: PDFedit
MD5: 302f06d276064810f25b7d7c878112ed SHA-1: 276a3a7cc778dcad5147b71af2c6bf5d288d7851 SHA-256: 3055211c8b1fa8475c370fffa1026e9f7a3ac336ee7ac42ecf8d748c95bd9212
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself appears to be corrupted or contains irrelevant text, but the heuristic firings and the URL structure are sufficient to infer a malicious distribution 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://teambicyclesplus.com/uploads/1/3/0/2/130271015/tiwudurakeja.pdf
    • http://gumpworld.com/uploads/1/3/0/5/130542729/morirokifeto.pdf
    • http://naturalwellnessacupuncture.com/uploads/1/3/0/6/130639214/4cfdd23fb3058.pdf
    • http://trdata.xyz/uploads/2020/01/28/5232121.pdf
    • http://mondiki2023.com/uploads/1/3/0/2/130288456/1365363.pdf
    • http://vintageofis.weebly.com/uploads/1/3/0/3/130312974/b8e3fd1a68e2796.pdf
    • http://shsucommunityconnections.com/uploads/1/3/0/4/130489090/puzonexebetezumotosi.pdf
    • http://pipestoneresearch.com/uploads/1/3/0/6/130603740/2869ff30.pdf
    • http://alexiscoutu.com/uploads/1/3/0/6/130621355/misipasipesujavigij.pdf
    • http://sanfordradio.com/uploads/1/3/0/5/130588943/7284129.pdf
    • http://nncconjesucristo.com/uploads/1/3/0/5/130551191/dc040.pdf
    • http://bestbroadbandsupplier2019.co.uk/uploads/1/3/0/5/130539105/130539105.html#fundamentos+de+enfermagem+potter+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000136e.bin
a87a685e294bd2d5d2d58e98fc1004e0df7a5b0a00f446dc1408cc86ed99f9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136E 11140 bytes

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