Malicious PDF — malware analysis report

Static analysis result for SHA-256 95564bf380e1fbf5…

MALICIOUS

PDF

51.0 KB Created: 2020-10-28 14:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a5934db9d278201dcbf5e88ca8f57e SHA-1: 676e1f43983cd573f0bfe83eadad39ca763e5fa5 SHA-256: 95564bf380e1fbf584bff0ae19c05482222ebe77d4930600fc63b03f346ee97a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Mike Barnes Cobra Kai' and the malicious URL, suggesting a lure. The presence of numerous links to S3 buckets and Weebly domains, some flagged as benign and others unknown, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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://gettraff.ru/strik?keyword=mike+barnes+cobra+kai
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/soxakavukasubuwoxi.pdf
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/f25d90e0f.pdf
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/wakapaxewixiko.pdf
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/rejojokipibofiz.pdf
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/konikoxofineja.pdf
    • https://sedogosep.weebly.com/uploads/1/3/4/4/134486754/2882571.pdf
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/fanejifovilokanen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tetazino/tuxemovajobixolibasob.pdf
    • https://s3.amazonaws.com/texifaxepag/13826113692.pdf
    • https://s3.amazonaws.com/mijedusovineti/ssc_stenographer_books.pdf
    • https://s3.amazonaws.com/henghuili-files/nudoji.pdf
    • https://s3.amazonaws.com/rovuweraja/nawedolijejebixose.pdf
    • https://cdn.shopify.com/s/files/1/0497/2953/6151/files/debafakosanobiviwifijopa.pdf
    • https://cdn.shopify.com/s/files/1/0482/2240/4760/files/48483928958.pdf
    • https://cdn.shopify.com/s/files/1/0486/0893/6096/files/baixar_jogos_android_offline_gratis.pdf
    • https://uploads.strikinglycdn.com/files/6a07cb91-7a02-489c-b367-832cc09b43cd/83632825628.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/95837882609.pdf
    • https://uploads.strikinglycdn.com/files/017e37fe-cca3-4520-8747-95c366803ab0/gaxutajipuwepasov.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_off00008953.bin
7e5bb6d10ef03f55f91634d07161a1b495dcf6d4398801a1d01579448624e573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8953 4972 bytes
font_01_sfnt_off00009a54.bin
5ab558e00c906054fb07710142f31d69ceba6791af0e80ce482811150eee70b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A54 10708 bytes

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