Malicious PDF — malware analysis report

Static analysis result for SHA-256 945b9b8f800bf384…

MALICIOUS

PDF

44.2 KB Created: 2020-10-28 12:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 267b9468d33d6894e9a0607e814ad370 SHA-1: d496cef2480e3e2879e7c27412f8413aeb637294 SHA-256: 945b9b8f800bf384615d34bfd43b56870ed285d5686cf396f1e698c995c1743f
124 Risk Score

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://ttraff.me/123?keyword=this+war+of+mine+tips+ps4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_5f98d26dd7ddc.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/seburuvenu-vafiwatebej.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f89a366eb448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5f928a38ad5c9.pdfIn PDF document text
    • https://pirizujimo.weebly.com/uploads/1/3/4/4/134454944/kesemeko.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/redadidafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f8b26b72a897.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5595580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f89f8b5826cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b50.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b50.bin)
    • https://uploads.strikinglycdn.com/files/61a55d50-5fe5-4631-b5d1-525f900c4b58/xozulowupegutofonesiraje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/tragedy_of_the_commons_article.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ed962a-84dd-48a5-8a32-388dc8331d46/raseposizidemukegogozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7652ac2c-0645-4b7a-b76e-aaca4029c3f6/tisaxukevumitevorovilepir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/isotopes_and_atomic_mass_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9199/9926/files/82589759239.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 extracted file (font_00_sfnt_off00006b50.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B50 5236 bytes
SHA-256: 9c0280e7fa17e97d6bd23684d23ef373f66f6152958b35b23b9813374dafed71
font_01_sfnt_off00007d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 11680 bytes
SHA-256: 35136b98f5ab3e3032dd1c570b7cb88683935c4acc59fb8106ccc43fa075a99c