Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0fc27169450d1…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 04:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e255407b72e83be03b91cd2012e04c16 SHA-1: 4add6cf6f76fd80b413951715ce23c3924ac741f SHA-256: 5cd0fc27169450d19ef3b743ab8445f96aa00f5e7e023081a8677fb93a573549
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.cc/wix?keyword=learning+from+data+mostafa+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=learning+from+data+mostafa+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/terejaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/algebra_nation_section_2_topic_3_answers.pdf
    • https://cdn.shopify.com/s/files/1/0448/1440/1697/files/waxetixisiduk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/62443916648.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/70425245290.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/55973141530.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2331/files/vblank_shakedown_hawaii.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb19d5022f14b53acc4175ae0f043c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_07840ca1bf734c56adf1ec0a5d14d843.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ce8aabb2fc745a494fbb8c43f72d152.pdf
    • https://static.usrfiles.com/ugd/b8c837_d42d25c9b49e4e99b857bf4018648e8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da2dc5df60c4aa28a00aed2239a116b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dbd7efa4fa7415da0ee8d929faab59a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff4.bin
eb37c156d801f4e308e10f2a53b0071f92c44738ea91f22a676fbc4de22107f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 5272 bytes
font_01_sfnt_off000071d1.bin
bb0e89d065d9d13aacbe9df403c13757d329c0ef58a7b83843736e5833c7af45
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 10752 bytes