Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6652359c2bf74b…

MALICIOUS

PDF

46.3 KB Created: 2020-11-06 22:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d710e9b7851e0c45be20355e95acdd93 SHA-1: 39db09e3207bb757a1f4ec56ecefbb1288c9d8bf SHA-256: 5d6652359c2bf74ba28c82a85012f20951274f184ded9b29febe3070b325f88f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The presence of the URL 'https://trafffi.ru/aws?keyword=marq-e+entertainment+center+houston' within the document body further supports this, indicating an attempt to drive traffic to specific content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=marq-e+entertainment+center+houston PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f8e8b1824ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f8b8f3f20537.pdfIn PDF document text
    • https://xewebetolibas.weebly.com/uploads/1/3/4/3/134372476/700a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f971575363cc.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/e0431255f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f939f5fc6a66.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/9478793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5fa4676a6210e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f8f059bba2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_5f92e98d4d99b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f9d9419b5552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5f96fc17d5efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_5f98030493898.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/ea2cf3a4-f582-42f9-a766-bffc460e3b89/2281013056.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

Related samples 7

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_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 5172 bytes
SHA-256: 096abfe778ebf1158bad1081a3dc055f6b7383511cd71701fac5dbc8c7f59898
font_01_sfnt_off00007ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE9 13952 bytes
SHA-256: 3f4b060b2b9e692d83544c3cee499288a001bab4a947894f84002f104853131b

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