Malicious PDF — malware analysis report

Static analysis result for SHA-256 882b18a5fd8e9113…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 13:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fd231d9da15f9dd127aa40a6a2fe6a2 SHA-1: e435a16f27b28a74714a8e3d4fb822de1cc3a03a SHA-256: 882b18a5fd8e91136de18ee6c54b1516a5a4ca9b8fc73200423568e6300384f8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to external PDF documents. One of these links, https://ttraff.com/wix?keyword=apoorva+raagangal+songs++tamilwire, is flagged as malicious. The document's structure and embedded links suggest an attempt to manipulate search engine results or redirect 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.com/wix?keyword=apoorva+raagangal+songs++tamilwire
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5a1791_4c2ea19d59484840bb99da334dd3f82e.pdf
    • https://static.usrfiles.com/ugd/f63f29_b5798cad00884888852f0f8268724440.pdf
    • https://static.usrfiles.com/ugd/67e251_1587b246567e46adad3088645aec128a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c17f3298405947f49bc50135515a1ae4.pdf
    • https://static.usrfiles.com/ugd/01e791_d39b5091c07b45bfa03a9e2e9952a08e.pdf
    • https://static.usrfiles.com/ugd/5a1791_661b1bbd113b4f22a5488f91ebea6aa6.pdf
    • https://static.usrfiles.com/ugd/23e9be_a0a77ad95c0f40b898d66ff8d4e0f802.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeba14b6879c43c8a61d852a8f1d1ae3.pdf
    • https://static.usrfiles.com/ugd/769f78_62f49c8a156c4c1080fc9939975c7477.pdf
    • https://static.usrfiles.com/ugd/73cb9e_cc65a528135842d0a7bf0e38e96b8287.pdf
    • https://static.usrfiles.com/ugd/7baf93_cd7c5ba305ef4a448c8e7b8546372d13.pdf
    • https://static.usrfiles.com/ugd/7ff653_028ddaebdd7044bb82b891464609edf8.pdf
    • https://static.usrfiles.com/ugd/b98abb_7cb67104ab46479b980337e3cce40eee.pdf
    • https://static.usrfiles.com/ugd/6da380_52572ae3cf8747b085ec78ccef174cd7.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e71.bin
d4be9fa7fd3cdb740d57560e25565f7ce08beb7b9126807699f48b7d30eea711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 5280 bytes
font_01_sfnt_off00009067.bin
4961cc75ffcab81ea87139a9520088ef006c035eea5e86f4f5295accf51ec856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9067 10128 bytes
font_02_sfnt_off0000b367.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB367 16164 bytes

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