Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eee2d278d483c1…

MALICIOUS

PDF

42.4 KB Authoring application: pdf-parser
MD5: c6b560a6dceac39c772fc46660f91054 SHA-1: 8ca3880721d159697f2aa141a3e18b907fdb9201 SHA-256: c6eee2d278d483c1a620be00de7262519856b4c6f74b8f9ed122f66bd778d480
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier indicated a high probability of maliciousness. The primary attack vector appears to be a link farm, with numerous embedded URLs pointing to external PDF files. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern, suggesting the intent is to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bowe.geltser.info/uploads/2020/01/28/6395080.pdf
    • http://mrsstucksclassroom.weebly.com/uploads/1/3/0/6/130621294/wobunizuwuxajeg.pdf
    • http://thefishvan.com/uploads/1/3/0/5/130540477/wizem.pdf
    • http://zeparo.fuse0000.online/uploads/2020/01/27/pulowapuzi.pdf
    • http://newenglandgirlsnpl.com/uploads/1/3/0/3/130379445/3661750.pdf
    • http://aerolinkarizona.weebly.com/uploads/1/3/0/2/130272483/6978c.pdf
    • http://kathleenmaree.com/uploads/1/3/0/4/130475965/buzilobaradopem.pdf
    • https://kogubafe.weebly.com/uploads/1/3/0/3/130313284/535613.pdf
    • http://motosapimo.steuerschroeder.com/uploads/2020/01/29/06e35eae6e8834.pdf
    • http://campchow.net/uploads/1/3/0/6/130604240/2013aab2af.pdf
    • http://shockwavesupport.net/uploads/1/3/0/4/130490218/c5ad724e2fc.pdf
    • http://whitneyswings.com/uploads/1/3/0/3/130313525/4e21388c.pdf
    • http://kznagency.ru/uploads/2020/01/27/8429799.pdf
    • https://futivokijeda.weebly.com/uploads/1/3/0/2/130272504/bibawibo-kudisedonowa-gumus-fokaje.pdf
    • https://nuzexuwod.weebly.com/uploads/1/3/0/5/130539657/4733692.pdf
    • http://mysoundcollective.com/uploads/1/3/0/5/130552016/130552016.html#donde+se+realiza+la+descarboxilacion+oxidativa+del+piruvato

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001497.bin
64522b07d01e7899b1f6b12154790b38ac4ab21f347b5adcc2670792c2f2f164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1497 9088 bytes
font_01_sfnt_off00005eea.bin
babe403de6de54d55b400948696eda07788430e2b852cfd621b353dea7ef1e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 16060 bytes

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