Malicious PDF — malware analysis report

Static analysis result for SHA-256 178efef331cd9f2d…

MALICIOUS

PDF

39.2 KB Created: 2020-08-14 11:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44e0d1e5079c4b8d570f223362f45b50 SHA-1: 30dc5a59c7fcad4dabbb99e51e50bd2d63a10a7e SHA-256: 178efef331cd9f2d8ca41e9c4d9f04c46fc989a11da34ec5ab28285afb8b5b98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to potentially malicious redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body, though partially corrupted, includes a URL that appears to be a lure for a 'beko oven instruction manual'. This suggests a phishing or malware distribution attempt disguised as legitimate documentation.

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.cc/pify?keyword=beko+oven+instruction+manual
    • http://borol.elizabethdeangelis.com/uploads/1/3/0/9/130969963/lolapigasudufa.pdf
    • http://files.raewyncaisley.com/uploads/1/3/1/1/131164095/newupiwisenatesudiz.pdf
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdf
    • http://talexas.sevoparis.fr/uploads/1/3/1/8/131856772/kobanowawoboxe_xexananebi_zuxonapipin_zavabaluxof.pdf
    • http://files.futurescapes21c.com/uploads/1/3/0/7/130739211/vukaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/56868092976.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/6377026874.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/17597405196.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/15662717723.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5216/files/accouchement__domicile_en_afrique.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/apgenco_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/descriptive_paragraph_writing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/98453985625.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/828lm_liftmaster_internet_gateway.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/44500014036.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/23559068353.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/sufepiwopopek.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_off00005c9f.bin
9741cd779e2c6d3c1fdfe5862df13a119294a7a2b6ae59e8e0803f359b84ccca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9F 5120 bytes
font_01_sfnt_off00006df6.bin
742ab3e435df6c6169c0db74f3da9adfa71ff90873d5090fb52f0462e2c41a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 10084 bytes

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