Malicious PDF — malware analysis report

Static analysis result for SHA-256 1714a80e19dec6fe…

MALICIOUS

PDF

40.8 KB Created: 2020-10-16 06:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5b2ca838ef62fe09bbb361fa6db273e7 SHA-1: 7f3fe950038196be5b5ca2494097676e9363ed44 SHA-256: 1714a80e19dec6fe3ab46176ccc1b9c1c2b430f7a0e6db79f204449e697c6c6a
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://ttraff.me/pify?keyword=acomaf+chapter+55+pdf In PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/kuzazonerifamim-siromoruwefop-nemojiweti-fomirozadu.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/6970516.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/vikimofalida-sifuvutuxiba-zasuxazupotul.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://site-1039784.mozfiles.com/files/1039784/90675822079.pdfIn PDF document text
    • https://site-1043297.mozfiles.com/files/1043297/69056249415.pdfIn PDF document text
    • https://site-1038788.mozfiles.com/files/1038788/siboxu.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/38162990738.pdfIn PDF document text
    • https://site-1038360.mozfiles.com/files/1038360/darejarijasedizivew.pdfIn PDF document text
    • https://site-1043314.mozfiles.com/files/1043314/lafosimapijiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8737f31dd6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f88f3959ef66.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/48152f83-56f7-40e8-aec7-646f087161d2/84350390633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053403fa-8aaa-42df-939e-9bdd666dd82f/nijitifag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67f8ab9-3972-4a3c-8e81-b2fe6b05b60b/48766559387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1525/4428/files/rhizome_food_storage_in_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2122/5114/files/savekupopefas.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_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 5296 bytes
SHA-256: 66a6a95cfe48fbf2b683dd688d95a2e530e0fae6d5aa57bd0baa241d4b851dfe
font_01_sfnt_off00007379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 10256 bytes
SHA-256: 5cd95e3b659ecfddb023ca1b31d1f5572c64c188d2348421ec9701042bc781e6

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