Malicious PDF — malware analysis report

Static analysis result for SHA-256 681268204b02c2f5…

MALICIOUS

PDF

48.9 KB Created: 2020-08-24 19:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf286d4a1f2fe2e090e164e81ea5d8b1 SHA-1: f21e2b6bbe52b10d45bdfba6f74aca5938c772bc SHA-256: 681268204b02c2f54b3d33d2202071c65417a8f70003b6c2fd68d0a9b15b7fb7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=lm741+datasheet+gain+bandwidth+product', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to disguise malicious intent. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

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/pify?keyword=lm741+datasheet+gain+bandwidth+product
    • http://files.gpaclasses.com/uploads/1/3/1/3/131383889/0d03e6e9efda.pdf
    • http://www.datasheetcatalog.com/da
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/historia_de_la_administracion_publica_en_guatemala.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/wordly_wise_book_8_lesson_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/2507/1256/files/vomapuxilalewimirevomuloz.pdf
    • https://cdn.shopify.com/s/files/1/0441/0068/1880/files/triple_arthrodesis_surgical_technique.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/brand_ambassador_contract_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/33509725681.pdf
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/96832243264.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/renozibukoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifenawapuvesuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/cartello_vendesi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000518a.bin
43c272ac6993bc30a7663059a2d352a0d05ba9da6c1607914c764acf6db8f64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x518A 4068 bytes
font_01_sfnt_off00006003.bin
9d9edab5719b3e36ca41fa7ee5bbde33d9b40b32e5fd8794b810cabfae283e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 5848 bytes
font_02_sfnt_off000073e4.bin
cd75b97792d403e2cac243dc7413da7db41b660c816390be4311982c43aa1340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 14132 bytes
font_03_sfnt_off0000a099.bin
65415fb21ac4ae4c56534953ef5fdeaa3da47a51d3942c2a273648219e70c5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA099 16256 bytes

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