Malicious PDF — malware analysis report

Static analysis result for SHA-256 477af6664f73bf9d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-25 10:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4083a2efe58cab227658ac696ddce20 SHA-1: 808bffde46cfdebef710627c097f8b1d034949a9 SHA-256: 477af6664f73bf9de6ca8bd0327c0685869bb93ced9349c4ea0422d8f9aca57d
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and several Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content or manipulate search engine results. The ML classifier also strongly indicated maliciousness.

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=filmbox+premium+tv+guide
    • http://files.sobukai-estonia.com/uploads/1/3/1/4/131483719/a720524460fab.pdf
    • http://files.yourpremiersupplies.com/uploads/1/3/0/7/130775055/5331062.pdf
    • https://cdn.shopify.com/s/files/1/0463/5459/6001/files/sidatipenikupivoxizorune.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/anarkali_of_aarah_free_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/vatesa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/ginikonogolisukomanik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4320/0929/files/7th_grade_ny_state_math_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/audit_report_qualified_opinion_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/sezajidaxoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/building_construction_by_rangwala_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9830/files/wordly_wise_book_8_lesson_4_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/84644772411.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058b1.bin
91d3767297a5fe89c3bfbf71ad20480f10b79162923d6f3cec4457371f5e6939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B1 4888 bytes
font_01_sfnt_off00006957.bin
3623a930226aa84b562da5fb1be9529ca22e5eca38e97a88bb30d20dd124d973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 10128 bytes
font_02_sfnt_off00008c02.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C02 4324 bytes

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