Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ec01c22666b36e…

MALICIOUS

PDF

45.4 KB Created: 2020-09-01 01:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b740a5fa42a94ad3cf7eea165af7eab SHA-1: 2018e3250c03fce56a4218612283e4d466846f1c SHA-256: 66ec01c22666b36e0173ed38d6b5b2b26ba609322a90468623795eb04c350f0f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=final+countdown+sheet+music+violin'. The presence of a large number of external PDF links, many of which are benign, suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the embedded links are the primary mechanism for directing 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.cc/wix?keyword=final+countdown+sheet+music+violin
    • https:///rSupport
    • https:///21585386
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9ff9b8_643c5159cd8a41c192586ba8990c02b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f71dee7c754c49a1b475d2b705e2bff9.pdf
    • https://static.usrfiles.com/ugd/a382ee_1c0704fc2b544175b12bc167fd89294b.pdf
    • https://static.usrfiles.com/ugd/353d00_a5776e6026244e86b9992523b17f952a.pdf
    • https://static.usrfiles.com/ugd/b52961_d542c8ff03e846b38b2661c473289ecf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/fifofadesamozogixutasajit.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/apa_citation_format_website_no_author.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/mepesivij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/gibobubuxatogerusegafija.pdf
    • https://static.usrfiles.com/ugd/b8c837_06c94ce8b47e43228f51319a208a66f1.pdf
    • https://static.usrfiles.com/ugd/a48928_d589ee40b3c841d2ad83b5afb39942c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeeec7059f2c46c69f5ad0e5a6696a2e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_51c723f385fa45cb8489c9a983419051.pdf
    • https://static.usrfiles.com/ugd/b8c837_42ea0d87af1e4d1a914af7bc1e3cd140.pdf
    • https://static.usrfiles.com/ugd/5b5da7_6a29aad8a79c4c37b7e36ca31538aad2.pdf
    • https://static.usrfiles.com/ugd/be19e1_b75bc38db2114ded8585c5e7d95970de.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_off00006669.bin
2aa684f81533550cd3077740afaa3f2a50da7212e93f224ebaf60e10ac7354c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6669 5188 bytes
font_01_sfnt_off00007801.bin
805b312e081c88bdf5a9c7b31f8273efb32b6b9fb0c9fa0818e3b4dd12fa76aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7801 14888 bytes

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