Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b646c4ea88a8a3e…

MALICIOUS

PDF

64.2 KB Created: 2020-12-07 22:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2a4f6c9327552725b7fb31bec287a3d4 SHA-1: 7a33e8ee42fb74cf918fdf1a5eaa1106edfb4be9 SHA-256: 3b646c4ea88a8a3eee73217409079d9cb8593f60e5aac3ec04041d9c8daaecfc
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links to external resources, a common tactic for phishing or redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=comcast+cl+0x000f'. The presence of a large number of PDF links suggests a link farm or SEO abuse technique to obscure the malicious intent. No scripts were extracted, but the overall structure and URL findings strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gettraff.ru/123?utm_term=comcast+cl+0x000f In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f890af5e01c3.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/lunideg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474450/normal_5fabf9ff6f004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fb36e04eb1a5.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/delalopobopixaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5f9754807cb49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5fc295adef4d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2bfb37-5ab2-4449-912e-82bb27d14084/dragon_age_inquisition_enchanter_ellandra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7af4b3c-f986-47c0-ae55-5248e50b38a7/35336564322.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/99559313925.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 5044 bytes
SHA-256: 9e5b91e54f669d5777330a7b5971c7eaecc6aef258e88536db79221e257c9641
font_01_sfnt_off0000d01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 10652 bytes
SHA-256: d2d4130e2d6680a69be6d5cca41e1357d604803aeff61cec08f7f52e99a5f741

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