Malicious PDF — malware analysis report

Static analysis result for SHA-256 276ab013774c8382…

MALICIOUS

PDF

56.4 KB Authoring application: Pdftk
MD5: 1c3d25d9d05a5a97bbb6f96a8357c1ce SHA-1: 5830a295022177082b6f2da3dfcc7816f9fe0336 SHA-256: 276ab013774c83820b8f80233a37cdfd2618eadb2090d19ec2d178b82d7ae8a2
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious, specifically as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a phishing or malicious redirection campaign, aiming to lead users to potentially harmful content.

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://meter-key.com/uploads/1/3/0/4/130435925/lojat.pdf
    • http://vandenbossracing.com/uploads/1/3/0/5/130588475/vafogirilame.pdf
    • http://feba.glistov.ru/uploads/2020/01/28/e4507.pdf
    • http://blueagavebarcom.com/uploads/1/3/0/4/130483804/1020780.pdf
    • https://bujizawoworotam.weebly.com/uploads/1/3/0/3/130379333/8727602.pdf
    • https://baxipoxak.weebly.com/uploads/1/3/0/5/130538997/172af33.pdf
    • http://destinysites.com/uploads/1/3/0/6/130621257/kisupu-vazugutarefuzip-penevi.pdf
    • http://advizher.com/uploads/1/3/0/3/130323806/pedunuwisofab_weputaperar_jemem_pozezamigavenuk.pdf
    • http://sectormental.net/uploads/1/3/0/5/130541623/japix.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/3/130313022/130313022.html#instalacion+electrica+de+una+casa

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001351.bin
2f3b931055c208d08d2dfb91df36e22cc797ba0d037d9a08d1a682ef503e2556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351 10152 bytes

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