Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de31f3c0108458d…

MALICIOUS

PDF

42.9 KB Created: 2020-10-07 19:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5264cfef98bb974a5a876104a1bda00 SHA-1: a05a44e3e13c7c3a1225bdc5c3880086fea88b86 SHA-256: 9de31f3c0108458d2ac570ee368d5891a8453e5273cd2a74a8fd682d4895f347
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=i+saw+the+devil+torrent In PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/pozasenanekurubaren.pdfIn PDF document text
    • https://site-1038979.mozfiles.com/files/1038979/sivotudozozobavogonub.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/96250278683.pdfIn PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/13387865437.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/68830288683.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/rivowijexubebufek.pdfIn PDF document text
    • https://site-1040386.mozfiles.com/files/1040386/toduvejafavozalid.pdfIn PDF document text
    • http://files.thomasmccartypromotions.com/uploads/1/3/2/6/132681452/888470.pdfIn PDF document text
    • http://files.kristinasdesignpalace.net/uploads/1/3/1/8/131856205/1884b03602e3.pdfIn PDF document text
    • http://files.punksurfboards.com/uploads/1/3/1/3/131380208/4e16994a.pdfIn PDF document text
    • http://files.yourhealthwithin.com/uploads/1/3/0/8/130874430/kabepofukita_doluronegorid_gupixezevabev_zawikiwukoke.pdfIn PDF document text
    • http://files.standrews.qc.ca/uploads/1/3/1/3/131379394/kelajimupados-baviwidage-juwazi-veriripuwutew.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/1e7ff54e-c7bc-4fb0-9fba-27150f1f0a1a/62979700937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1295fc36-7961-4469-accf-6e4b46012bab/25561202473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba3c212-eff9-489e-b888-51fb4fcb8992/nizaxuromabitonisa.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_off00006b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B16 5004 bytes
SHA-256: e0afc9cb12ad79a3f539804ace2625be909f5c2327c27b5697c1845e690520f8
font_01_sfnt_off00007c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 10212 bytes
SHA-256: 90b07c1c9473f67416db0170f3477970a0ebef07f512b537c6d4934627971d92

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