Malicious PDF — malware analysis report

Static analysis result for SHA-256 126022deb7dcd178…

MALICIOUS

PDF

33.3 KB Created: 2020-09-02 00:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 372cb4ac9b707c7d3df31826df5cacb3 SHA-1: ddb50329c093189e02bcd1f7c9a50fe14500eaa3 SHA-256: 126022deb7dcd178e8e30933c03141fe9470ddaf9970d8125ed083a8224d548f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=kundali+bhagya+video++aaj+ka'. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=kundali+bhagya+video++aaj+ka
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b5472a_67b7384844704ce5847cb6b6d3e88431.pdf
    • https://static.usrfiles.com/ugd/4c1554_fadd0a3ab2cb47e4952a87f55021a5f7.pdf
    • https://static.usrfiles.com/ugd/d3758e_e21cfab80cde4b5d8425c11582b6380c.pdf
    • https://static.usrfiles.com/ugd/2f3216_0b49f91f86604aec9f8bfc289ab81346.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_29d0988f4ed24260a16f4b24e657ed00.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/81723646313.pdf
    • https://cdn.shopify.com/s/files/1/0428/7977/8979/files/sokaxukan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/5143719644.pdf
    • https://cdn.shopify.com/s/files/1/0435/6793/9743/files/xutufumazusawegorobodapal.pdf
    • https://static.usrfiles.com/ugd/a4d998_375bad0a447d43728108b9059f99e4de.pdf
    • https://static.usrfiles.com/ugd/b8c837_283e40783a034a528e2f92a6d43a4b39.pdf
    • https://static.usrfiles.com/ugd/9cc572_23e97961d2bb410fa67e11d788168cd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cd28342c4c4789b321a1bce7b0533a.pdf
    • https://static.usrfiles.com/ugd/8ab72e_6ae670eaab16466199a329c41b000a48.pdf
    • https://static.usrfiles.com/ugd/74a852_39d4ef3bc9de4fe9a57c8ad0ebba4e89.pdf
    • https://static.usrfiles.com/ugd/b88e3d_d012246a815c4cf593f53bef2002d528.pdf
    • https://static.usrfiles.com/ugd/aec2ea_ddcd03f4b1134ba5be38c0099f945d31.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_off0000478d.bin
920c32f32bee3c7735eb71ac2972d7272730ec85b4b39d6741d370ebfa2e3f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x478D 5224 bytes
font_01_sfnt_off00005961.bin
1aaa26289176c9711df27feb9fca43c67d6b80c9e0399691ed1db78a6efc54d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 9172 bytes

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