Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0661399045854f6…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 21:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b059b4a1bc4548159eed453869dd0290 SHA-1: cfdd9646fd8275e4bdefc1da60ddab728b442272 SHA-256: f0661399045854f656e497982417d9b39ae2e53405f6335d6c2bba5bd5602355
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a lure related to a 'certificate of registration of marriage form' to trick users into clicking a link. This link redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to distribute further malicious content or engage in SEO manipulation. The SE_BROWSER_INSTALL_LURE heuristic indicates the document also attempts to trick users into installing software, a common tactic for malware delivery.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=certificate+of+registration+of+marriage+form+e+pdf
    • http://files.libbymourant.com/uploads/1/3/2/6/132696174/lukezi.pdf
    • http://files.soccerplayingmomct.com/uploads/1/3/0/9/130969965/8c3e74b9577928f.pdf
    • http://kopami.davidawestbrook.com/uploads/1/3/2/6/132681352/5605257.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/runodawesifok.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/al_azkar_an_nawawi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/naguvederabesosuxatede.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/buteladajokajumarabeli.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/grammaire_allemande_facile.pdf
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/medicine_dictionary_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/77832196881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewobaropelizovijekozuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/coffeescript_iterate_object.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/nivotaduraxalij.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/vubesetelezoxixuribegugar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/carbon_footprint_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/69080226809.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/86671610857.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/72433216162.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_off00007503.bin
f820751ec992b22c85bd07ad46120cf3f7b39026d8dfe780ed18665e911c7020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5348 bytes
font_01_sfnt_off00008716.bin
425d82c10bdf02236f156897887c4ef0c6e51552d28c3e4336ea635edb7a68cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 10076 bytes

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