Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1168f3444c5fa3…

MALICIOUS

PDF

72.5 KB Created: 2020-08-28 11:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 431a6366facc74f05c09daa5ce7979cc SHA-1: 93e65de230075bda079c5836af90be20d029b32a SHA-256: 5a1168f3444c5fa3ed022d89b341c85b86c47e0395d2d82cc3f124cc1144ad0b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a PDF link farm hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body is heavily obfuscated, but the presence of the 'pokemon brick bronze wikia' keyword and the redirector URL suggest a lure. No scripts were extracted from this sample.

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.com/pify?keyword=pokemon+brick+bronze+wikia
    • http://fumologiv.intowishinarts.com/uploads/1/3/0/8/130813528/22b3c6c5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/xulipopunipixew.pdf
    • https://cdn.shopify.com/s/files/1/0438/4171/6389/files/72145268267.pdf
    • https://cdn.shopify.com/s/files/1/0437/8125/9421/files/pagewukokufiriwilokefi.pdf
    • https://cdn.shopify.com/s/files/1/0448/1875/9842/files/sample_approval_request_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/19647105891.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/xukarisufogogenogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2632/4383/files/learn_english_basic_words.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/definicion_de_antecedentes_de_la_investigacion_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0440/6027/8936/files/67141561219.pdf
    • https://cdn.shopify.com/s/files/1/0437/1113/5894/files/job_application_letter_sample.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_off0000df7b.bin
54dd5e8e1f1ed6aef7b189ff5360487657c57bc15fc0131217ba8bbdc2db95f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 5084 bytes
font_01_sfnt_off0000f0c8.bin
ddef0a46e68c82f90e0870034e9fdc045aaeabed36237d2435b7eeb2adcd8fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 10676 bytes

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