Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4f178b1961c150…

MALICIOUS

PDF

55.0 KB Created: 2020-11-02 00:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3302a37869295b118586a4fbf170c754 SHA-1: bd1bf3bd6b0d2667b7f8dc0f2878c43143e6c634 SHA-256: ed4f178b1961c150d03ac0a948fe6385913d1ba1af70f31d5651c7311da855f4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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=a+drastic+way+to+diet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_5f90d000ecfec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a3a894ca-1e5f-4dfd-b9ff-3f1d5e77c990/55164363566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea11dc9-92b3-459d-9a49-b7b7fa5580b3/supinuxofoxakiriduzibuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1f34ea-d8bf-4e05-9507-d47a2099727e/xofabevipabunubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ba7c68-6b07-4c3c-8b0e-c883e8236f06/ditoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28667961-1fae-4a97-a24c-b1aebcb34893/jizomajegomegeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814e0ef2-73d3-4912-a3ec-cde5d530c1a8/is_lacey_chabert_a_born_again_christian.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/xevejuxoxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1bb7ab-83c4-48a7-a899-98cd497c0583/8910736814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9884/2299/files/papa_louie_wingeria_cool_math_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc31a002-e3eb-4b37-9d0f-31c68fb2712a/polazabarix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4631094d-bf1c-4ceb-b101-ee6d9e6478dc/56978094667.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0F 4768 bytes
SHA-256: 5c998cb095e938b723bb972fb2f61e75dc94dee5e811025621497cd724fd849e
font_01_sfnt_off00009d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5D 10628 bytes
SHA-256: 38e1de88769d819348f01fdc7a21c673d564977f50eac6ffeef5a665bd736abd
font_02_sfnt_off0000c10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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