Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90becee4b8731ef…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 15:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 477712769c94c5b837ca763201bf193a SHA-1: 241091077c40809555c9e62caaa4c432612267c3 SHA-256: d90becee4b8731ef16e96f61bcd40b6883c99bdd682628a6e7722bc8097b6ea2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/wix?keyword=broken+heart+text+message'. The document body, though heavily obfuscated, contains this same URL, suggesting a social engineering lure. The presence of numerous links to external PDFs, many hosted on shopify.com and static.usrfiles.com, indicates a link farm strategy to obscure the ultimate destination.

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=broken+heart+text+message
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/72112255514.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/6388309961.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/albumin_kit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2505/6412/files/39006785705.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/37581731952.pdf
    • https://static.usrfiles.com/ugd/82e28d_05861e1f18154575a252733108302ef2.pdf
    • https://static.usrfiles.com/ugd/12745a_d76bad007540438685c1e2ba5076fddd.pdf
    • https://static.usrfiles.com/ugd/cd79e3_538d0a7fe01b4c22af536fe481529e08.pdf
    • https://static.usrfiles.com/ugd/221f3a_3727e262e77d45d3b5e265296e3dd127.pdf
    • https://static.usrfiles.com/ugd/764aaa_61bd9c5cd0f742669124187f496fd40a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b9532331dc4e2fb6faa92178c372c5.pdf
    • https://static.usrfiles.com/ugd/9ea91e_ed2846e3c0694a0386f8c16fa58576ba.pdf
    • https://static.usrfiles.com/ugd/b0b521_04d7aade381148cca9a0f076611c82dd.pdf
    • https://static.usrfiles.com/ugd/bf0735_5b72f5dc9f124fccaf5ba8c7d9cb2d39.pdf
    • https://static.usrfiles.com/ugd/26481d_b248edbf521e408d81850c795e8286a5.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_off000064a3.bin
b145781afd62bcdfb0da3fcfb698bc825ef4224dfe8c73e07c2bef04968622bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 5248 bytes
font_01_sfnt_off0000765d.bin
5dd60d6d3f011d795dc19cfc83ba976ccc40cda20e12c7a04114939af3a080ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 10252 bytes

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