Malicious PDF — malware analysis report

Static analysis result for SHA-256 713b765d57265622…

MALICIOUS

PDF

59.5 KB Created: 2020-08-03 21:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 332bcb76438a43baf47c9b2bd4cfb476 SHA-1: dee0e127ade8391a993ea4cad5bf52155d9efa87 SHA-256: 713b765d5726562283f86536e809163dda7ad08a0504dae11e7d2890a43a2847
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free downloads for popular content, such as game codexes. The primary link leads to a redirector, indicating an attempt to obscure the final malicious destination. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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.ru/pify?keyword=warhammer+40k+8th+edition+codex+pdf+free+download
    • http://files.l1goalkeeper.com/uploads/1/3/1/1/131163718/sotipivupoludaj.pdf
    • http://files.togetherincounselling.co.uk/uploads/1/3/1/4/131438899/7ef4e.pdf
    • http://limoso.toplinepriority.com/uploads/1/3/2/3/132303238/galupogip.pdf
    • http://files.tremontsports.com/uploads/1/3/1/6/131636728/wogubemuwimopaj-sekuzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1750/0834/files/48885770829.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/76814547131.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/xikapusapasemam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/81442953363.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/samsung_idcs_28d_administrator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/dabevawefarikikumifaloz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/putugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/39449265390.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/wirejosasuge.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/zuperevidetoduzubukonug.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_off00009ca3.bin
0571a5d39b6eb22b2254f24ce368df94a33bb23ca90ed220df1b0ff91a28858d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA3 5876 bytes
font_01_sfnt_off0000b0a4.bin
677ab748a9ec0a7109fe2e7c1d5f5efd975f699f7a83cf6a36b00413ba2805c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A4 15424 bytes