Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abd569429bf309b…

MALICIOUS

PDF

48.2 KB Created: 2020-10-10 18:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c91312d22a5b80b528d4b4e955aaadd6 SHA-1: 93fe32af4af13ee5a4be63d445d36ba7a2c93e28 SHA-256: 8abd569429bf309b074d14cba47b20fe115ffedf5b044af6aaeb17d1079e40d4
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://cctraff.ru/pify?keyword=familia+y+comunidad+que+es'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=familia+y+comunidad+que+es In PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/15490273653.pdfIn PDF document text
    • http://files.millie4good.com/uploads/1/3/2/8/132814892/5f496945681.pdfIn PDF document text
    • http://files.naturesjoint.net/uploads/1/3/0/7/130776206/e15dcafed4.pdfIn PDF document text
    • http://files.wilmcommunityadvisorycouncil.org/uploads/1/3/1/4/131453399/notizozudu.pdfIn PDF document text
    • http://files.southpawspetexpo.ca/uploads/1/3/0/7/130740173/lowegenave.pdfIn PDF document text
    • http://paraxiteg.renegadesfp.com/uploads/1/3/0/9/130969633/6102232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35bd73b-bdfc-48a2-ac90-9c59453e42c0/lunodijuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dad7d0e-3974-4407-8e38-9ac3bfcddf55/64142040629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d3a881-48f9-40a2-a7df-99c2e524b663/najugitugasixotetizodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0259/6008/files/40166614554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/75791363001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7729/4485/files/24944742477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8948/8792/files/sunny_d_book_spree_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9797/4693/files/bye_bye_foundation_powder.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 5172 bytes
SHA-256: b880943ff54f21e90134b4f4be61494cafb6482b8e92fe01a49912b706ec083f
font_01_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 10268 bytes
SHA-256: 31ac67d85388baee44e91b3d47fc8c34d8b0972b481d454864621d2d6182c20a

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