Malicious PDF — malware analysis report

Static analysis result for SHA-256 9524e23e40a78f74…

MALICIOUS

PDF

48.5 KB Created: 2020-08-29 00:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a27e05ce779c8c010296a613e12ae68 SHA-1: 5d98f8e23268fc0c72ea86705178d4c3c2511ab0 SHA-256: 9524e23e40a78f74e2447cd7fd4a9f1458415fccfd2c1a214dd6911ed9e56fe2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to HPV testing and the malicious URL, suggesting a phishing or scam attempt. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site.

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/wix?keyword=combien+test+de+d%25C3%25A9pistage+du+vph+co%25C3%25BB
    • https://static.usrfiles.com/ugd/b8c837_dacb405f5c0948269e918c9157dbddd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c9e523034c3444dafbdfb705f38b5ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_53822e562a8d44d19f61581a3675b8df.pdf
    • https://static.usrfiles.com/ugd/b8c837_89d332af4a29486188fe47c5a757534d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/90984015940.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/37352468704.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/ms_sql_developer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/ghazwa_khandaq_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/employee_turnover_formula.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/95221037454.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f843f2230d04802a9bf72260ef7aaef.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8ef1cf0359e4496adfba4afcf0b8cd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_14f7d16806454fd3a55314dead9ca008.pdf
    • https://static.usrfiles.com/ugd/b8c837_67869d0b1a424653b7b6877be0e9f2df.pdf
    • https://static.usrfiles.com/ugd/b8c837_8404108979ec48829d20bde8f35c623c.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_off000079d1.bin
88c8bf7c1582c0681a09bb3965344386ffbfc6b1fd869b93cb2417c517bf2ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 5728 bytes
font_01_sfnt_off00008caf.bin
5ff1d81c43bbef55566672f68f28ea2299d11a6664934c671b8a451495e03d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAF 12308 bytes

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