Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd9b4709317adfe…

MALICIOUS

PDF

34.7 KB Created: 2020-08-13 14:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5787475c20db5b2f9276de578734be12 SHA-1: 9e6351f555b58977c1d96a39935d3e333916154d SHA-256: 4bd9b4709317adfe0c715e216a8a46030838f8f187f257be4219855723497a95
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=huffman%20medical%20record%20management%20pdf'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and several other Shopify-hosted PDF links, suggesting a lure to external content. 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/wb?keyword=huffman%20medical%20record%20management%20pdf
    • http://files.artbyjenduran.com/uploads/1/3/0/9/130969051/muborewaluvopes_vavise.pdf
    • http://files.integratedbodymind.com/uploads/1/3/1/4/131408899/362880.pdf
    • http://lepalilo.cfyf.net/uploads/1/3/1/4/131437423/c2c96f981321.pdf
    • http://files.lifestylestudioseducation.com/uploads/1/3/0/8/130814340/e3637e2a43.pdf
    • http://files.tinastoastytoes.com/uploads/1/3/2/8/132814473/8588723.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/maniac_magee_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/german_english_frequency_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/download_books_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/fifazofebegosafef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/ahwahnee_principles.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4470/files/sekebesedamukedoganadev.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/archer_helm_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/lscn_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0443/1210/1020/files/catalogo_avon_campagna_10_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/nekelowubukupovukijurelij.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/fipukuditozimorepobatele.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_off00004931.bin
eaa556f412fdbd6b4303327e57029a4a12722be66e50013ff1707927534bfcdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4931 5256 bytes
font_01_sfnt_off00005af0.bin
7d0e3456a35e065a4ba4f1775cb556053fcdc8820a367fb9f4c95c64e75c7837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 10276 bytes

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