Malicious PDF — malware analysis report

Static analysis result for SHA-256 871ac559ea80f8d7…

MALICIOUS

PDF

51.8 KB Created: 2020-10-27 01:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d3d801f8880fde5400250b63f524b991 SHA-1: 27c3e8144da381c08e4781a22296736656b67a6a SHA-256: 871ac559ea80f8d7551626d23ebcf6685b7b671203855869aef38fcc5427ca34
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/123?keyword=2+player+platformer+games+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f974841394bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f870af47dbe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f9565e8c8ce8.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/9585912.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/6894429.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/b1ee2004196.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/dobenugula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f8ddc4e75f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f92b4c387cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8cfa4d7fdcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f8c0954da392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f8b6209c02ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f90a2a4419b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f89eae7b0ca1.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/6757270.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/farejajiwugutijonom.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://s3.amazonaws.com/salosibejodod/gideloni.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/boduxisudobo.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_off00007d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 5652 bytes
SHA-256: 9a65be99ef5eb889f21eaa5865c5f2ceb3a6692c649953f2d03ebabe6b37dc07
font_01_sfnt_off00009037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9037 10320 bytes
SHA-256: e591c576ee7bcfbf84d1a600a5c4a1c32a32d734f3e4a11e6905090fe426e330
font_02_sfnt_off0000b350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB350 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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