Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0c9bbc3cef04a0…

MALICIOUS

PDF

39.9 KB Created: 2020-11-02 13:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df55618d6cf6065edd0420d02655c574 SHA-1: 155f15de8f7bd1bb8646fec70d1217d27e04f3be SHA-256: 9a0c9bbc3cef04a08f428cb3a36ea225e113668dab45deda4c376dd79db296f5
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://cctraff.ru/123?keyword=nicky+s+folders+wholesale. The document's content and structure suggest it is part of a phishing or scam campaign aiming to exploit users through deceptive links. No scripts were extracted, but the presence of numerous external links and the ML classifier's high confidence indicate malicious intent.

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://cctraff.ru/123?keyword=nicky+s+folders+wholesale
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f94ecae92f12.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8f6b42d1033.pdf
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/110817.pdf
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9642e8bebc7.pdf
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f88a47bdb9fb.pdf
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9bb8d7f071b.pdf
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8e6a565b712.pdf
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f918ad36e8c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0504/8526/4546/files/hernia_umbilical_en_gatos.pdf
    • https://cdn.shopify.com/s/files/1/0481/1672/7971/files/lidej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/still_star_crossed_livro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a9.bin
96e9ca71da4a8f467e66acb8543100db72d54364d7177dbdc6090d130a037bc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x50A9 4936 bytes
font_01_sfnt_off00006199.bin
5ab8d5bdd8cd48b3132190ca7653625d5947fb482774d874d6cc53639551877e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 10380 bytes
font_02_sfnt_off000084cc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x84CC 4324 bytes