Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e866d0eae44bf7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-26 12:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02df282c6a170ef1be8b6f9f9ef824c9 SHA-1: cd833068215b4a434ed22db5e076ecb76fcedd85 SHA-256: 15e866d0eae44bf76238cec4ade7b3b416faebcbf67305c4e8a781d696ff34c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised with a lure related to a "theatre merit badge". This redirector points to a large collection of PDFs hosted on Shopify and other domains, indicating a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful content.

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/pify?keyword=theatre+merit+badge
    • http://files.stoneworkswellness.com/uploads/1/3/1/6/131606550/6cdd0.pdf
    • http://files.moranenterprises.com/uploads/1/3/1/8/131856723/be1151cbc9afd.pdf
    • http://vixafudu.sarahrorvig.com/uploads/1/3/1/4/131483025/kuvotudumegex_gomaxajiduke_dabojexed_podavagezurav.pdf
    • http://files.saintjohnparishmorden.org/uploads/1/3/0/8/130874416/kodizilinabiwewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/0850/3456/files/bibliografia_apa_de_documentos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/appareil_respiratoire_cm2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/45029444639.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/13232761880.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/ikariam_mobile_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/difference_between_parliamentary_and_presidential_form_of_government.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/lowes_montoursville_pa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8256/1176/files/concurrency_in_go_o_reilly.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_off0000609e.bin
f66ce39b47d43ccdd8e7e15222118f43326f709e59eb2a8659c046a97843895c
pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5116 bytes
font_01_sfnt_off000071db.bin
33a4c77e31b4be994cffdeb98de9e91e65dc86f1f9ad06cbf6eb17d60bb23c88
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 9876 bytes