Malicious PDF — malware analysis report

Static analysis result for SHA-256 276b9364130c3a8d…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 04:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab3f95d07d21415b381b4220205abf34 SHA-1: f17b1561f0d3ad2a3ffc1745a8e40c27daaa3045 SHA-256: 276b9364130c3a8d0e4c823d51762f0682d385bed2f6aa877e3a5354e301a1f0
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, which is characteristic of a link farm. One prominent link, 'https://ttraff.ru/wix?keyword=monster+hunter+mod+ark', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to 'monster hunter mod ark', suggesting a lure to attract users interested in game modifications. 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/wix?keyword=monster+hunter+mod+ark
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/wuzoxeralu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/react_native_font_weight.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nubirabodewujinawitolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/dewedusuxig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/55555321267.pdf
    • https://static.usrfiles.com/ugd/b8c837_170c03d1a7c44d7d85f26e262d8a86b0.pdf
    • https://static.usrfiles.com/ugd/0c268c_f7d1548c418a4669afa4fa039791aa68.pdf
    • https://static.usrfiles.com/ugd/b8c837_84be0dd07e9441c8ba4c6d17d03b8329.pdf
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_99d81550f2d043c0ae25a9aa20ca5d12.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/peduneguvapibafawos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8234/files/pokemon_original_150.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/naruto_vs_bleach_2._5.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/golitazuwosenov.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_off000058b0.bin
5e2da481524b9a17f05bf2f9a28f8dc18a29e3b04b0b05151be447fa0685c3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B0 5100 bytes
font_01_sfnt_off000069da.bin
c8b8b92aaa8145b1924bf8430db2fb718fb6abaddbcaa60445393142fccd8df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 10252 bytes

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