Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d232f3675ab5a1…

MALICIOUS

PDF

43.0 KB Created: 2020-10-25 22:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4272f0c0fcc96b9c02372319c84af42e SHA-1: 2de031ef73f4950aacf950126f3cc8e3fc034141 SHA-256: 24d232f3675ab5a171289542c35415a1e32824b175daa5b46eb67d452d1badc2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that lead to other PDFs. The primary URL, 'https://gettraff.ru/aws?keyword=hiv+aids+information+in+marathi+pdf', is identified as malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to manipulate search engine results or distribute malicious content through a network of SEO-optimized PDFs.

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/aws?keyword=hiv+aids+information+in+marathi+pdf In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/sosepazikodo-tolakilapagapoz-xuzukunixi.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/kogog.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/3028899.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdfIn PDF document text
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/5d13163c9ac45f.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/4618549.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/d941398337.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/6854454.pdfIn PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/maturumirubevevariji.pdfIn PDF document text
    • https://lozatovetifeg.weebly.com/uploads/1/3/3/9/133999134/23b9e2.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f875e985941a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8e7313c1e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8ae5f557520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5f95b35631480.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/1/0491/9135/4534/files/flip_phone_android_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5063/8755/files/59973677350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0284/6110/files/1992_champion_bass_boat_owners_manual.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_off00006afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFC 5268 bytes
SHA-256: 9a7a9c6a16af7743a6fb94ad798630fcb397068cc456542f3f9e7ed58c09e01e
font_01_sfnt_off00007cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 9948 bytes
SHA-256: e5a490b1dbc05b2bd5587bf1fafa1ce3954eb826450776e4dd80bef4628a7774