Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f009e0ef3d0a373…

MALICIOUS

PDF

45.7 KB Created: 2020-10-28 17:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b44569be2275494019692cfbc6e8876 SHA-1: be64586fa158109c297b64d3af5388755e635eec SHA-256: 2f009e0ef3d0a373b82841d60f216b4ca884b16432b1a838f79572afba57661d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=types+of+stretches+for+arms', which is also flagged as malicious. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or malicious redirection attempt.

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=types+of+stretches+for+arms
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/9c828390d99.pdf
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/mezegaliza-mimet-gukilomodekaje-vaxibopekexiti.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/8684813.pdf
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/a53f4503ffd.pdf
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/poxovulimama.pdf
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/vapatekixamumat.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdf
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/7975345.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/35828852457.pdf
    • https://cdn.shopify.com/s/files/1/0497/8524/1759/files/business_analysis_tools.pdf
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/myasthenia_gravis_physical_therapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0502/5516/7668/files/ragnarok_m_eternal_job_guide.pdf
    • https://cdn.shopify.com/s/files/1/0502/5061/2898/files/vevejegatazoxibem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/wuzobogapilazofas.pdf
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/compound_words_worksheet_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0491/9030/5958/files/zorudigifu.pdf
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/can_you_build_android_apps_with_python.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_off00007599.bin
cde9866e3e2f181b147104b19e9fae7d13c877fa1f18b9696335060d8c999a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 5272 bytes
font_01_sfnt_off0000876d.bin
37c7238d023055fe11f319caf0e8227bfda6d68a9c4be5eba1e901400bd02d3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876D 10016 bytes

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