Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0cfb114f7ac5e7…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 18:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1509f9cb6124aa2e7a8e8c16e4d68d SHA-1: 34221b1d6d2e42979aa56ae34bfe0eaa7e2f7f6f SHA-256: cc0cfb114f7ac5e7f54d4816def019c22c3ea1ba83f8ad7edc7188a0fdbd01a8
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=libro+top+notch+fundamentals+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to mask the malicious redirector. 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=libro+top+notch+fundamentals+pdf
    • https://static.usrfiles.com/ugd/b8c837_8e93079c07344e9a912a3c48193c910b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab263fd15120447dbafc7365514bc4bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f6068acbefa42d9a9039bad35eae4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf551a7e46aa44c3a958e961fa977820.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/simplification_and_approximation_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/revewulutumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/fotirobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/jammu_kashmir_srinagar_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/wesuxikelita.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/jitanodudusakamabi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/sapevuzibelulej.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_off00005a7d.bin
c7c315b98bc55ca3a3dc9274cb8cedeeac035e0d4117f41ebc23a5b36b2f4bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7D 5476 bytes
font_01_sfnt_off00006ce1.bin
58a9731774234330b4e384d59319895df384e98740efa72fe97ad7407b28a3d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 11260 bytes

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