Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9a12cc96e1e008…

MALICIOUS

PDF

33.2 KB Created: 2020-08-25 08:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ddbfa34993f22be2f38cfe3026010f SHA-1: 6d0c1cba1a693d57978031a7d11f02ffd29900d7 SHA-256: ce9a12cc96e1e008598edeabf610ddba9f51c47a25a80955b8ef32aa65f0940f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a deceptive title 'Icsi benevolent fund form' and embeds a large number of external links. One of these links, 'https://ttraff.ru/pify?keyword=icsi+benevolent+fund+form', is identified as a malicious redirector. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=icsi+benevolent+fund+form
    • http://jirak.pensionplanningsolutions.com/uploads/1/3/1/4/131409508/8e77eb348.pdf
    • http://zuvibi.seahawkstrackandfieldacademy.com/uploads/1/3/2/6/132680869/0ea619.pdf
    • http://vosiboru.maidans.org/uploads/1/3/1/6/131636908/soledu-nezezegexata-jikabuje.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/magazine_advertisement_design_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/51920387135.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/generation_zero_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/bisarogideramudegufosuxad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/61735904320.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/buffalo_wild_wings_printable_menu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/10121107590.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/isuzu_npr_labor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/97630576010.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/self_defense_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/logo_maker_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/asp_net_websocket.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046b7.bin
f7f4eeedd94e61f38aab2c9a7509ce76112132cf19a2e9eeaa39aaf180366ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46B7 5092 bytes
font_01_sfnt_off000057e5.bin
9372c54cb5c9dae2d0b1653063386e145e4eae06fa313971b63a37b364c428f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5 9452 bytes

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