Malicious PDF — malware analysis report

Static analysis result for SHA-256 85172eefaf71f9d5…

MALICIOUS

PDF

35.5 KB Created: 2020-10-05 03:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e126d0cb0b45d153488f90c1b34332dc SHA-1: e8198198d5beb96eb19f95bc8c0247759afc677d SHA-256: 85172eefaf71f9d500063c39457975c56d097072b7d50b926bbcd577355bca7e
132 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 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=eurythmics+sweet+dreams+mp3+download In PDF document text
    • https://site-1037854.mozfiles.com/files/1037854/bawamejegob.pdfIn PDF document text
    • https://site-1041591.mozfiles.com/files/1041591/wevowatitabewolokitusifo.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/busulewipof.pdfIn PDF document text
    • http://files.globalmathcollaborative.org/uploads/1/3/2/6/132681452/2941180.pdfIn PDF document text
    • http://kevazo.hangthattwang.com/uploads/1/3/1/8/131856456/3146390.pdfIn PDF document text
    • http://files.ukerepublicukuleles.com/uploads/1/3/1/4/131406604/bosunoso.pdfIn PDF document text
    • http://files.webchristchurch.com/uploads/1/3/1/8/131856454/xurupemuwawuri-xopumopowinoja-vufeget.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5768/7959/files/zurolusefifemibax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0509/5331/files/the_lost_girl_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/understanding_social_problems_mooney.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/glock_27_holster_with_light.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4447/3494/files/detesenumowiboxo.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_off00004c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2D 5628 bytes
SHA-256: 13f49df083883c1c160502628f9a29ca41dc3a2fcb176c67e6f55dc8dc5c33d5
font_01_sfnt_off00005f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 10044 bytes
SHA-256: 3d724412af78e81be5c0594a142deeabe8c1ac21cf5200e0ff4bd4910256776b