Malicious PDF — malware analysis report

Static analysis result for SHA-256 e637c7b9b266f886…

MALICIOUS

PDF

46.4 KB Authoring application: Pdftk First seen: 2020-09-15
MD5: 021e8b3192ead7e1f0d4ee2dfdeaabe5 SHA-1: 5977cab99fd0a20f0b1d1ea22cd1b73671bc521c SHA-256: e637c7b9b266f88605b7772f2861eb87a0752c9c2569fbac0bb98464c6050647
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output further support its malicious nature. The embedded URLs likely lead to phishing or malware distribution sites, aiming to trick users into downloading further payloads or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://ants-life.ru/uploads/2020/01/29/vuzujeku-lupawab-tapotamilam-fizijufebel.pdf In PDF document text
    • http://metropolismexican-grill.com/uploads/1/3/0/2/130287852/8437.pdfIn PDF document text
    • http://myinklady.com/uploads/1/3/0/3/130323594/22c18c.pdfIn PDF document text
    • http://nutritiongirl.org/uploads/1/3/0/4/130491703/2849443.pdfIn PDF document text
    • http://theelfbox.com/uploads/1/3/0/5/130589187/130589187.html#b1+english+grammar+exercisesIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194 7736 bytes
SHA-256: 0889e2a97def4448cd6321ae33d6dc2e1eec7aa34ee8d1334199274f314fe2ef
font_01_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 16508 bytes
SHA-256: fee8d81852334122717895109c2059c260d17b6cbcf32fdac71b28e55c2762cc

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