Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f969cc7271f262…

MALICIOUS

PDF

31.0 KB Authoring application: Smallpdf Desktop
MD5: 015993dc68ac40d9d4e6ad465b148d3e SHA-1: 61b2c4221a545912a8740d3732aa01f4203d1be4 SHA-256: d8f969cc7271f262ddacb06c79c686a2d56eea1e95096be01888ef8f366133ec
150 Risk Score

Malware Insights

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

The 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 presence of numerous external links, many pointing to PDF files hosted on various domains, strongly suggests a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier also provided a high confidence score for maliciousness.

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 https://tuwenugajas.weebly.com/uploads/1/3/0/2/130271077/pagokebesid.pdf
    • http://wasileju.winfilm.ru/uploads/2020/01/29/055ca3df0a83289.pdf
    • http://mtairygirlpress.weebly.com/uploads/1/3/0/5/130550980/6112700.pdf
    • http://planettammy.com/uploads/1/3/0/6/130620759/patoxowogup.pdf
    • http://rhiannonlisettehenry.com/uploads/1/3/0/2/130272332/7698586.pdf
    • http://rarad.amati-mobili.ru/uploads/2020/01/29/relipot-bidamax.pdf
    • https://wokezude.weebly.com/uploads/1/3/0/2/130289225/fisewikizivileti.pdf
    • http://besthairreplacementnc.com/uploads/1/3/0/4/130436050/fibofadesisise_sudeme.pdf
    • http://des.admventures.tech/uploads/2020/01/27/f28ac.pdf
    • http://2020blue.org/uploads/1/3/0/5/130551671/130551671.html#scorpio+endoscopy+reporting+system

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c8.bin
1b9812e74b1e25f4133166e0817fcaf347111db59a764afdf3e92374c1a6667b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8 7372 bytes

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