Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc5f2960515836e…

MALICIOUS

PDF

32.4 KB Created: 2020-08-24 01:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0545713d8f2f8ef02ecfc208564753e SHA-1: ae57d1f5c4f64b4004233c40970176b265554c67 SHA-256: 2bc5f2960515836ef84c4f0db3fa638d6e6593ce797d8ee50f4710ee38179517
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a "free song" lure, indicating a social engineering attempt. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=we+no+speak+americano+song+free
    • http://files.pascalab.org/uploads/1/3/1/8/131856392/fagoxobar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/tufokafizab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/volide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/bacaan_surat_yasin_dan_tahlil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/lobuxukovavimaduzo.pdf
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/initial_counseling_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/69075181775.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/fuwefave.pdf
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/mosigefezobobefonebulu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004102.bin
44e5a7b12154db58d858bfb7f895a7ead36024d2525b05178d5a74b3a2db31b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4102 5380 bytes
font_01_sfnt_off0000534d.bin
c73f91e8322a76ca181274be2623df48bbc481bee7a9bbdf93f20c2c09b005cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534D 9932 bytes

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