Malicious PDF — malware analysis report

Static analysis result for SHA-256 632c72f7d0773850…

MALICIOUS

PDF

52.6 KB Created: 2020-08-17 02:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a655953cfbfafaeb200391b112b395d SHA-1: 14014e2bc2f474f7d631e5207328acb160863509 SHA-256: 632c72f7d07738508faf6e36b4d186c06225cbd2f40e3c9dc336042b354eee5d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for distributing malicious content. The document body, though heavily obfuscated, contains text suggesting a lure related to 'radha krishna bhajan mp4', likely to entice users to click the malicious links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=radha+krishna+bhajan++mp4
    • http://xaver.yubakids.org/uploads/1/3/1/8/131872225/1882490.pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/atomic_bombing_of_hiroshima_and_nagasaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/find_part_of_day_by_time_python.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/29930840088.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/baixar_jogos_de_futebol_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/77212112616.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/2018-_19_school_calendar_template_google.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_off00008799.bin
c7c645f52c88c1aa738f774d5211fe208e2879732ac54ed57c65694d3a7ca76e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8799 5540 bytes
font_01_sfnt_off00009a43.bin
cd12a63d4a5ac6b9c136c947a2f5e06b13f15e38ebcc4a46a4c6e9ffc3eb2f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A43 13840 bytes

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