Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b58f6c657a146b0…

MALICIOUS

PDF

36.9 KB Created: 2020-08-31 22:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 917691e47b880bf1d14be6cc59d1835b SHA-1: 6c49bb23a0172f7eb56d66e13f800da06ff5dfe2 SHA-256: 9b58f6c657a146b0d80e16f5c9fa57796cc8a09d2ba22d2906bca2b1922b14e5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=archer+c59+manual'. This indicates the document is designed to redirect users to a malicious site, likely for phishing or malware distribution. The presence of a large number of embedded links, many pointing to 'static.usrfiles.com', further supports the malicious intent, suggesting a link farm or obfuscation technique. No scripts were extracted from this sample.

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=archer+c59+manual
    • https://static.usrfiles.com/ugd/d43733_71891c4de9d54b178d713dd6751d6100.pdf
    • https://static.usrfiles.com/ugd/10b11f_a77649d2f59d4a39a6c3c07dbdb4d67f.pdf
    • https://static.usrfiles.com/ugd/9e41f0_7ce5a324b3db489ab0738d420b9833d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419d63d92f34f3ca6cab4cd2a702b00.pdf
    • https://static.usrfiles.com/ugd/432b07_5cd80702dd484381b1b5e72e63cc6222.pdf
    • https://static.usrfiles.com/ugd/6260fe_77215f71183e468a961628a65738dcd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c1f3fb7df974c00b7f3a8f0f9b5b514.pdf
    • https://static.usrfiles.com/ugd/429b25_54e7c37f5c0d4b04aa1e3965450450ef.pdf
    • https://static.usrfiles.com/ugd/de3d83_86abb369a9c6404089f8d76a1c1bda97.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7493162631d4435b092bae9165f26ed.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/gebabawotubaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/99741168265.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/10979058019.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/administracao_e_gestao_de_empresas.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_off0000538b.bin
668a3a4ae4490ac65698666e0ef28e3f9628a29173a0411b6e9351fcfce2ba49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538B 5132 bytes
font_01_sfnt_off000064d6.bin
3d582763f13738a9457c1a1d22e42c2f3b6cf2c11d68ed0a9d8e190ceab09b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6 9996 bytes

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