Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cde114f88edb300…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 14:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec9bb67c416928d274c6400d6ce88e3 SHA-1: 8151be77df9793891965821d24adc849e25b8dac SHA-256: 6cde114f88edb3005d1cbace2088873fb6f80c801c6aba755810f6f419b46af0
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The presence of numerous other PDF links, many hosted on potentially compromised domains, suggests a link farm designed to distribute malicious content. The ML classifier strongly indicates 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.com/pify?keyword=incident+report+police+number
    • http://tigemu.unionvibeent.com/uploads/1/3/0/7/130738848/cb0f3d.pdf
    • http://saxapew.balancecomposuremassage.com/uploads/1/3/0/7/130775350/kotifuxu-sagalawarotafe.pdf
    • http://files.lasalleelementary.org/uploads/1/3/0/7/130776661/wemifiretivumula.pdf
    • http://files.redlotusskincaresalon.com/uploads/1/3/1/0/131070597/remotos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/75412862657.pdf
    • https://cdn.shopify.com/s/files/1/0437/4914/6778/files/sociolinguistics_and_sociology_of_language.pdf
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/lurozuxiwetisewemofamatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/poxemokadulodexodaruwag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8107/2789/files/oxford_picture_dictionary_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/strasburger_tratado_de_botanica_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/bioterrorismo_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/dubabuxuwobefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/gukixudiripikeni.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/eharmony_harvard_business_case.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/strategic_planning_framework.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/54615458179.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_off00006c92.bin
c6545b5a4c71211f3a893454690d950b85bbbcb4b9c468b20af9ebee347a76b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 4908 bytes
font_01_sfnt_off00007d11.bin
862d2b1a309bfd5d5cdeb5a6cef47bc394b2a53894048a0636094ae437ad101a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 10516 bytes

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