Malicious PDF — malware analysis report

Static analysis result for SHA-256 4272e9994dd46d82…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 13:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add9fc22bb3fa0c62ae051fd59edc6e9 SHA-1: 9f0d0bad5fafbe6ccd01d61d7d48ef4b7c21c688 SHA-256: 4272e9994dd46d821a6d44213585328c245fae47181833dbcbe7645797ecfbd2
150 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, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text referencing 'Internet explorer 11' and includes the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the primary malicious activity appears to be redirecting the user to a harmful site.

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.cc/pify?keyword=internet+explorer+11.+0.+96
    • http://mikawawid.compassengut.com/uploads/1/3/2/7/132712336/5870094.pdf
    • http://lozawofa.forsan4e.com/uploads/1/3/2/6/132682905/9529427b.pdf
    • http://files.megfoster.co.uk/uploads/1/3/0/8/130814926/8446976.pdf
    • http://files.carolinelea.com/uploads/1/3/1/3/131397955/fubaxokirokav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38743570217.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/77286121607.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/77683950388.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/15115408112.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/tezaberazoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/94501830999.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/baxom.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/kaxijozebakosir.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/test_z_angielskiego_dla_pocztkujcych.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_off0000613d.bin
7aa6beec23269c9e8089f0d7b73102a05dc1e8c1447edc542a9eb9794dc24867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 4964 bytes
font_01_sfnt_off00007233.bin
f58eb50a534cb504e15e1905a5f4172516439b0994ba177a8c892e306591990c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7233 10124 bytes

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