Malicious PDF — malware analysis report

Static analysis result for SHA-256 9345f0fc140439f8…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 06:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e2da311b8a8431ec3260048ff4dba9 SHA-1: f3feb31051bad37692a9d08c57dd8b0e052882f8 SHA-256: 9345f0fc140439f8dcad4e2063000c213890e8741e62dbcf71e6253195771164
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=y%25C3%25BCzey+merkezli+k%25C3%25BCbik+yap%25C4%25B1+%25C3%25B6zellikler'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to static.usrfiles.com. The document body is heavily obfuscated but contains the same malicious URL. The primary attack pattern involves luring the user to a malicious site via the embedded link.

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=y%25C3%25BCzey+merkezli+k%25C3%25BCbik+yap%25C4%25B1+%25C3%25B6zellikler
    • https://static.usrfiles.com/ugd/b8c837_ec4a275d710244c5a2b50610b0d6abd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3912266a6694ec7a4038ccb1f1778ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_506724a12a4b45fea7f9a92acaa957f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e8723e5c2844bbfaa6b46d80c58e448.pdf
    • https://static.usrfiles.com/ugd/5899d5_2174698d4b2347ebbd3272d81e2364f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_499c8ad6c9ab4dd1a51819844814866c.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b62fde182245a490cdfdb8545c9830.pdf
    • https://static.usrfiles.com/ugd/362633_43087f7da54549c19a2b7d6b4e3b423b.pdf
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/60251731863.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6337/files/98544787584.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/33449711632.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/48516553255.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/jspdf_autotable_colspan_header.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_off00007198.bin
e0d2fb1d118dd1ff3ea83240a69aa7139a08dd98f340eadc068d56c60b256fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 5396 bytes
font_01_sfnt_off00008368.bin
d306d2ffb0189fe69ee28004036492c7e340503f802f3993b0e224cfc4b64bd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 11708 bytes

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