Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d84a376df0eb914…

MALICIOUS

PDF

44.5 KB Authoring application: PDFedit
MD5: 796346623d7ec09971135c9cc0048b0f SHA-1: ec756ab262b842c08e6fca93a1615c47c6277d8e SHA-256: 6d84a376df0eb914f9fb1d5e4fe4dc25b9efd14a105141058a93a874ac611da9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The file contains a large number of embedded URLs pointing to other PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

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://photographersumbrella.com/uploads/1/3/0/5/130546977/d0cdaa07793f.pdf
    • http://girishchavan.net/uploads/1/3/0/4/130476083/vavujifizifa_zomabe.pdf
    • http://pmgfiletransfer.com/uploads/1/3/0/7/130738852/b7ac5ba258.pdf
    • http://trial2.cohesionengineering.com/uploads/1/3/0/5/130590716/vejufevuf.pdf
    • http://bluewingstudio.com/uploads/1/3/0/2/130289387/wogilerag_verurinakoluj_rexutavoniwa_patonegal.pdf
    • http://hostmaster.bensondrivescotland.com/uploads/1/3/0/6/130604605/sakawojogefetozux.pdf
    • http://stephenharrisonweb.com/uploads/1/3/0/5/130589411/bexason.pdf
    • http://aledger.net/uploads/1/3/0/5/130589429/vaperamexab.pdf
    • http://thewindingsheetoutfit.org/uploads/1/3/0/6/130639148/xedaju_lumebezozubesa.pdf
    • http://myracare.de/uploads/1/3/0/3/130312925/f35e76006.pdf
    • http://yourjourneywithjenn.com/uploads/1/3/0/3/130323209/4857941.pdf
    • http://www.youkilledwesleypayne.seanbeaudoin.com/uploads/1/3/0/7/130776436/wubezed.pdf
    • http://londoncitybears.com/uploads/1/3/0/4/130488416/821384.pdf
    • http://global4xloan.com/uploads/1/3/0/7/130775607/6425176.pdf
    • http://www.jamiebright.com/uploads/1/3/0/5/130542991/feragilabidid.pdf
    • http://treinasoft.net/uploads/1/3/0/8/130813972/d74071be.pdf
    • http://74-123-72-182.mgwnet.com/uploads/1/3/0/4/130483389/130483389.html#women%27s+asia+cup+cricket+2018+results
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004527.bin
7863b829de04ea8b7f5be4d5dae43fa62182e7611f0c3a300d10b316d27db496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4527 2732 bytes
font_01_sfnt_off0000517c.bin
b0689d323cdc4a12708d63841c520155e3b3a6a31eec15c5ee582ce79e492401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x517C 8168 bytes

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