Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ab312fbe21f0fa…

MALICIOUS

PDF

41.8 KB Created: 2020-08-24 09:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d00f3ad33977e42a31c3c3bd28fb617 SHA-1: cb67f8c9efca2ab05cb67cbade614259d6b2a8b9 SHA-256: 63ab312fbe21f0fab302344cc2e1291574c479a496568c3ebb246fe5b19ebf1e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=joint+aspiration+procedure+note+template'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=joint+aspiration+procedure+note+template
    • http://files.booksatafifth.com/uploads/1/3/1/4/131437532/8080415.pdf
    • http://files.chartercitytoronto.ca/uploads/1/3/1/6/131637308/787d2ccda70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/wuvitavedamonufi.pdf
    • https://cdn.shopify.com/s/files/1/0465/2328/5662/files/income_spreadsheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/jodonagesagatuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/36558804398.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/arduino_uno_tutorial_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/biotecnologia_industrial_vol_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/makalah_amandemen_uud_1945.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/fearfully_and_wonderfully_made_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/dusopurifupafusulodazoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/22422345991.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/limebiwixebixozupevero.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/biology_science_for_life.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/pexigimobeba.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/plastic_fuel_tank_repair.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_off00006486.bin
00919e36c58e27ceff2da220452d223b87d217ae34cd586db9cb5bc2d0337c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 5208 bytes
font_01_sfnt_off0000761d.bin
53f3754967b7f1c170a95e99e812ec9673a7311e9e781c71e934e212baac24b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 10548 bytes

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