Malicious PDF — malware analysis report

Static analysis result for SHA-256 561f7cb612e695aa…

MALICIOUS

PDF

39.6 KB Created: 2020-11-01 09:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3efb11ec63e2add0f81bba5ab7b20e5a SHA-1: e6d92ef2d662a2a0c5e99f430b03b7964ded005f SHA-256: 561f7cb612e695aaa992f84b369b7a80827b7fe794977cf5f9adcab4366dd18c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, 'https://ggtraff.ru/aws?keyword=iphone+negative+color', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to lead users to potentially harmful content or phishing sites, likely as part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/aws?keyword=iphone+negative+color In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f9e12838ac25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5f9d2edf0dae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5f911a633c6e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f89ceb07d910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8bbd7c5c81a.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/menanuvop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f925ba135618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5f99f759b952f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f873fc0d293b.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/vatim_pobavoxiduviliv_rewekodeba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/capital_des_pays_du_monde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b48a13-45d4-4553-95a5-bf5264cd9d25/vozerejugusukepubinakok.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_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5016 bytes
SHA-256: 84687296405451e6ebdcb9f45802b7e27f5145d8b29b35c480b18b461d4ae8b4
font_01_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 10436 bytes
SHA-256: 0899b0020f8f391900191b83707d3c9bd71e98f44bdba6b9bff204d88580e696

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