Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0174b26336fd0df…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 08:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fa76c5db809d4a67b81bcff86e6c44f SHA-1: de31da301e6cbc7b12f96a84565a59c6660485bd SHA-256: b0174b26336fd0df7d2d640bc9e984e11327bca514a2d790e5b8e8ed6c5fef63
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=alveol+k%25C4%25B1lcal+damar+aras%25C4%25B1ndaki+gaz+a, which is likely used to redirect users to further malicious content. 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=alveol+k%25C4%25B1lcal+damar+aras%25C4%25B1ndaki+gaz+a
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/fomupiwizikujuziloxogut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/23365379917.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/riwex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/kusibiwomoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/las_actividades_permanentes_de_lectura_galaburri.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/careplus_prior_authorization_form.pdf
    • https://static.usrfiles.com/ugd/4f270c_ae73055482f942689d4588afc2bf35bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_99954bb74cb147488e9f8f03f8aefa03.pdf
    • https://static.usrfiles.com/ugd/299074_fa42e0c8b4e640f6a1acb917971ed41d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d49632ee9294ca1a27a9e31d8779245.pdf
    • https://static.usrfiles.com/ugd/b8c837_88ca40505ca84e849957cd6520c240bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_79b507ca0b134cffa733b2836ba609dd.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_off000049e0.bin
3103db4459b4aac66bf1d0ecfce58057fbed3e328ef8a04ce4dd6e28165f6cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E0 5456 bytes
font_01_sfnt_off00005c5f.bin
542c52d9d8f168a27008e70712bfc4ec2818ace687eda0c3c95bf9d6edef8019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5F 11640 bytes

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