Malicious PDF — malware analysis report

Static analysis result for SHA-256 140a096b5734391b…

MALICIOUS

PDF

68.1 KB Created: 2020-10-25 08:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06817ceb8b00c48c42286953bdbbfbf2 SHA-1: 7da4507ec5d7ff8b31a239e809359940b0d0898f SHA-256: 140a096b5734391bcee1dc3c7365be91a943e49710bf924e4a833075282462eb
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it redirects to known malicious infrastructure. The document body contains a URL that appears to be a search result for 'star wars coffee wallpapers for android', which leads to the malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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 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.
  • 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.com/123?keyword=star+wars+coffee+wallpapers+for+android
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8e5d9734f79.pdf
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f90b15293aff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivuxo/definicion_de_genero_segun_autores.pdf
    • https://s3.amazonaws.com/wefadep/hernia_hiatal_deslizante.pdf
    • https://s3.amazonaws.com/gupuso/lajenodizomezubibuf.pdf
    • https://s3.amazonaws.com/jijumupade/tulunu.pdf
    • https://uploads.strikinglycdn.com/files/7c3dfec3-ca8e-450d-b305-47d9d1a3e8bc/50324018553.pdf
    • https://uploads.strikinglycdn.com/files/40dcae49-b2e8-4b39-8fd2-f4d7e4c86e53/lezugofonasasiluru.pdf
    • https://uploads.strikinglycdn.com/files/a52f438a-d506-4dcb-9e57-c4a25f6c59de/96520613429.pdf
    • https://uploads.strikinglycdn.com/files/a40f5a44-cf08-4e96-adca-b1ad54270cf8/50688282511.pdf
    • https://cdn.shopify.com/s/files/1/0500/2022/1092/files/mazubove.pdf
    • https://cdn.shopify.com/s/files/1/0505/4624/5814/files/52291554263.pdf
    • https://s3.amazonaws.com/nowonovege/34943240739.pdf
    • https://s3.amazonaws.com/tapexiw/personal_attributes_of_a_teacher.pdf
    • https://s3.amazonaws.com/jamokaroxoj/bureaucratic_management_theory.pdf
    • https://s3.amazonaws.com/baxekojojexusol/punctuation_marks_rules.pdf
    • https://s3.amazonaws.com/zewimu/ap_literature_syllabus.pdf
    • https://s3.amazonaws.com/dinilederu/73747187277.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc00.bin
4204d4c2a10603f579b76c532cbe886bf389ce6b73716119c099ba7fac90428c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC00 5344 bytes
font_01_sfnt_off0000de4f.bin
3128d7b0b70c7640220e85104312da3e1ac9d3f0ce8a0ea9ed2ed520094222f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 11112 bytes

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