Malicious PDF — malware analysis report

Static analysis result for SHA-256 735b9d88904e615e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-03 10:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb4dc8c8c3ec84a6c7030639d381531c SHA-1: 306bdf8b73aa3bc09e747eb8aba116e3230ad8b1 SHA-256: 735b9d88904e615e022c4e846fb4bed9a99fd92a66f395fa38196f4a30104173
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mindless+behavior+net+worth, which is designed to redirect users to further malicious sites. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection scheme.

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=mindless+behavior+net+worth
    • http://files.suzannewittfoley.com/uploads/1/3/0/7/130775191/kofotiwuwaj.pdf
    • http://files.midmerry.com/uploads/1/3/1/6/131606730/rerapububijodex.pdf
    • http://files.meadowlakefreshair.com/uploads/1/3/1/4/131453024/sudidaraviz.pdf
    • http://files.pantherbrake.com/uploads/1/3/1/6/131606490/xigudedij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/87806030199.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15900382268.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/semajidu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/fibin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/diwelomewuvimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/ropemokasinelodibaxideja.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/lobepanugikod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/94009480271.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/nova_3_near_orbit_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/free_3gp_movies.pdf
    • https://cdn.shopify.com/s/files/1/0440/1656/6422/files/mexifonobaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/72668185325.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/pixelmon_arc_chalice.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_off00007932.bin
f4ed5ebef37915078444af9da67695ea971842a926ce2f285cec89fbb993db90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 5208 bytes
font_01_sfnt_off00008afb.bin
b29f810175106bad66efe45a8546b9376d4633909a62570a27e05a80eb70b8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 11288 bytes

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