Malicious PDF — malware analysis report

Static analysis result for SHA-256 7391bec0f829daba…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 11:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af23e68f8e6c6401c65941fc24dd61cf SHA-1: 36693f1795a1686139c66845bee09392356d4484 SHA-256: 7391bec0f829dabafb22cc9abb54e39da6feb8c1fea991e564fb698f7ce0c97b
162 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://ttraff.com/pify?keyword=risk+in+international+trade+pdf', is identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking the link, likely as part of a phishing or scam campaign. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=risk+in+international+trade+pdf
    • http://files.applefarmcommunity.org/uploads/1/3/0/7/130776110/pubuwolalu_tagunusufinujav.pdf
    • http://files.lovehealthyme.com/uploads/1/3/1/4/131407655/5d3d07cffb109d.pdf
    • http://vodavifax.kilrushns.ie/uploads/1/3/1/3/131384281/nesolavuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9529/4109/files/beech_baron_58_poh.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/sumolezaxuvekipufepiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/99229220567.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/didaginisax.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/nivofobuzorevesiteriwat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/93998200851.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/alopurinol_posologia.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/kiriwadidurajenizeji.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/54304033202.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/9721008795.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/89623045255.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/essential_oblivion_mods.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_off00006b66.bin
600c61c9ad8d0aefab479fb35f6652ba64b0f1d8ae6de9bad3c533cbb17d0e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B66 5108 bytes
font_01_sfnt_off00007cd0.bin
7a512adfecab1b7c6f34de5dc5b3c8e742968920c1a0dc0e1effb47d28a9d280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 9880 bytes

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