Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9260cd61850343a…

MALICIOUS

PDF

33.3 KB Created: 2020-10-31 21:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7e2dc9b6ff65104fffa6ff550e98f103 SHA-1: 2c7c8c9485dda5a453c22ac79ebf44a072f59047 SHA-256: d9260cd61850343ae7c4ceca6660c90a16a0722a3d0709518cc1de8f223c470d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?keyword=definite+integrals+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8ca1330d367.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/970308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5f9812eeb249d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8aab0eb3486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f95f1b2472c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_5f8f32081907b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f8c17846039f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8fa127dee1e.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/6644034.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/14582163-53cf-4858-8475-398ec18bf42e/95786959761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf9daa5-7cb2-4e42-9bac-ae78c012a05e/68829050293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83eb58d-c56c-4bbf-9357-fab5ca0a3b62/honda_eu2000i_spark_plug_cap.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 8

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_off00004801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4801 5184 bytes
SHA-256: 09912cb005ca07491331192ca2b145514ede4d1db1a64b5a07a574dc69ac2481
font_01_sfnt_off000059be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BE 9120 bytes
SHA-256: 6d5825169a0f1fdec5870635fe3c4cacd2f55fbfa367c5fdf18458c2631f163d

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