Malicious PDF — malware analysis report

Static analysis result for SHA-256 908d18c53ca1179b…

MALICIOUS

PDF

35.8 KB Created: 2020-08-31 10:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c211f05668e5ae15c2a86b378618135b SHA-1: ae18a630060ed25d60adc1d354d9fb1eacdb4d59 SHA-256: 908d18c53ca1179ba2af0848856d6b1dde8f22981748df13815236abc2583811
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links, many of which point to a known malicious redirector. The document body contains garbled text but includes a URL that appears to be part of a SEO link farm designed to lure users to malicious sites. The primary malicious URL identified is ttraff.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=hotel+504+new+orleans+tripadvisor
    • https://static.usrfiles.com/ugd/b8c837_9f19f3f709c24505b265ac7d5dbada1b.pdf
    • https://static.usrfiles.com/ugd/e643da_a526b4f4cfa7491ab3ef1c3556350062.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5f3042b10294b0591d80125eb6fd2ed.pdf
    • https://static.usrfiles.com/ugd/d43733_9db7d1d482a74830abbb1e89e22a3c8c.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/bladder_cancer_treatment_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0469/3383/5931/files/lenozujutuvosetubezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/goxerasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/3512048557.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/papebefidipuwagufejebab.pdf
    • https://static.usrfiles.com/ugd/e42ee3_1c010045064848b78caec9ee12bb9875.pdf
    • https://static.usrfiles.com/ugd/e6092c_8784dfc0f13c429496e50b1374fe1e8c.pdf
    • https://static.usrfiles.com/ugd/b47706_8f0dd6aee39f4844a1d367161b162f64.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_off00004d6b.bin
fffbe3be949b8dd55ae638687f1d56b7d6cb1fe0203a35009657ac86160f9070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6B 5420 bytes
font_01_sfnt_off00006002.bin
53a6ae7184054b4c829e33561c3a664d6a2ad965b38efe7fc114ed59564c11dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 10224 bytes

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