Malicious PDF — malware analysis report

Static analysis result for SHA-256 60912403af9d3b63…

MALICIOUS

PDF

59.8 KB Created: 2020-10-07 09:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3efc56391b5c9c332f85dcd0cb16e908 SHA-1: d434f602d7993598cd7771f70251786f8a2423b0 SHA-256: 60912403af9d3b6368be8edde12b243ada117178f0beeb5388299d9197396d53
192 Risk Score

Malware Insights

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

This PDF is identified as malicious due to its extensive use of link farms hosted on disposable domains, designed to redirect users to potentially harmful content. The presence of a 'download' button lure further supports a malicious intent to trick users into clicking through these links. The primary redirector URL is https://gettraff.ru/strik?keyword=download+city+of+ashes+pdf, which likely serves as the initial entry point for the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=download+city+of+ashes+pdf In PDF document text
    • http://sesusuzag.hivoltcoffeepickup.com/uploads/1/3/1/4/131453176/854462e79a.pdfIn PDF document text
    • http://jeduki.dynacomltd.com/uploads/1/3/1/8/131856439/0148871d9.pdfIn PDF document text
    • http://files.boostyourbodybootcamp.com/uploads/1/3/1/4/131406487/zedilujabuf.pdfIn PDF document text
    • http://zodavis.englandlab.com/uploads/1/3/0/7/130774981/naxujifiki.pdfIn PDF document text
    • http://xikow.deitzhousemovers.com/uploads/1/3/1/3/131379552/genekuzujeb_pebutize_voduromadegofax_xukudegateximab.pdfIn PDF document text
    • https://site-1038857.mozfiles.com/files/1038857/desulalirotidawetupiwa.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/porulapitidufit.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/2f9f276a-215b-443d-aeb3-8ef954dc26f8/dorabesusinulilosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3734efc-0e7e-4830-9487-3c94b8afa81e/86351449606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385e98d5-d0f8-4792-9ffe-983b62697e85/7651396686.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_off0000adc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC9 5340 bytes
SHA-256: 14f7dd9f0cb7839c6d8c233cb2b7947635563556e85f6e4d7507d05fd6c0aa81
font_01_sfnt_off0000c01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01D 10156 bytes
SHA-256: 48694fc2c03803388a9ae6aa51311a0a6d45579f8ae72c03cfb1b9ebbe31438b

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