Malicious PDF — malware analysis report

Static analysis result for SHA-256 17078174b213b26b…

MALICIOUS

PDF

38.6 KB Created: 2020-10-05 11:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09b2754c65ac58cb74a29d3adbdf052a SHA-1: e7d9cd6ca38027120ff71fc4b335a6d0879cc019 SHA-256: 17078174b213b26ba87a9e5858841da799ed76e7a0ca8d851451b5ce76356836
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=fake+book+dixieland'. The ML classifier also strongly indicated maliciousness. The document's structure and embedded URLs suggest it is part of a link farm designed to lead users to harmful content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=fake+book+dixieland In PDF document text
    • http://files.wildchildcoffeeproject.com/uploads/1/3/0/8/130814611/1875165.pdfIn PDF document text
    • http://gabibu.wscministries.org/uploads/1/3/0/9/130969862/164c1cf.pdfIn PDF document text
    • http://files.franklinwatershed.org/uploads/1/3/2/6/132681153/6216575.pdfIn PDF document text
    • http://kumis.anniedphotography.co.nz/uploads/1/3/1/8/131857090/kowejobobufogazinix.pdfIn PDF document text
    • http://posuki.nathartistcanada.com/uploads/1/3/1/0/131069759/pulodelusumax.pdfIn PDF document text
    • https://site-1038980.mozfiles.com/files/1038980/21379828459.pdfIn PDF document text
    • https://site-1038505.mozfiles.com/files/1038505/bowobuji.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/1/0488/4519/3381/files/fourier_analysis_of_time_series_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6438/6713/files/mifixebazuzabuvinefulod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8738/4742/files/final_fantasy_14_flash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5dad5d-eaf4-46ff-8dd7-3f8ef3921ddd/99020327844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73140afd-a482-4177-8e5c-5f2231795f3d/15920114681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfa7a47-8662-4147-bdd9-d93c64fe11b9/xirepuvazitigosime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3528cbbf-28ae-473e-a7a3-d270a1045c3f/mitadaginimapumem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01bbb2e-8087-4645-bf44-c9fb6df9af39/salusum.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_off00005a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A12 4772 bytes
SHA-256: 92ee9e54aeba6001707857f8e3928dcdbc7a9eec1f06d44874dbd66c79c40ad8
font_01_sfnt_off00006a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 10312 bytes
SHA-256: 146fdf118686fd0ee474f0c2210005fc99b90191418f23643c629f131541e7a0

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