Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedfec9d12dc8825…

MALICIOUS

PDF

43.5 KB Created: 2020-11-09 07:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed8a37e70c7c81634f7fbba166404436 SHA-1: ab6e2b4900074683c69f437717aece2a6f7f8837 SHA-256: eedfec9d12dc882511ce2243897dbb7588066130f04ebc7df2ae2f9f83c49517
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, but one key URL, 'https://trafffe.ru/123?keyword=directions+to+central+high+school+phoenix', is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting the PDF is part of an SEO manipulation scheme or a link farm designed to host or redirect to malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=directions+to+central+high+school+phoenix
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5f98b23773724.pdf
    • https://vobinuxidixuf.weebly.com/uploads/1/3/4/4/134471365/4690999.pdf
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/9450079.pdf
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f8fa3f2a28e2.pdf
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f9a5894d61d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xazadawedi.files.wordpress.com/2020/11/32024854716.pdf
    • https://uploads.strikinglycdn.com/files/715389d4-03cf-4971-a523-6002fe3ef3c1/zemezozazigatibimuledoko.pdf
    • https://uploads.strikinglycdn.com/files/488db8fd-d649-4df6-822f-b66b9c23b9ef/california_bar_moral_character_appli.pdf
    • https://uploads.strikinglycdn.com/files/477adb2f-79eb-4a6e-8fdf-479acf68294c/kapofutumoxutizuzif.pdf
    • https://lusiwelop.files.wordpress.com/2020/11/rifevafoxukemogipixugapin.pdf
    • https://uploads.strikinglycdn.com/files/f035fee1-5fc2-4784-b6e1-8951f080d634/61931959784.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_off0000666b.bin
e43b2e704f46ae6f334dd6c4555e0a73072aea4ffcdf1a7d5209ba5d03855c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666B 5260 bytes
font_01_sfnt_off00007858.bin
224e90f31ca4d528792858556c468b98be8517bdde13c92944eca0e905c182cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 11976 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.