Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5f5d5319e8f205…

MALICIOUS

PDF

35.3 KB Created: 2020-08-29 02:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b421500c92a884c8f77261b0a413a324 SHA-1: ab1cd1e9867373c2bfa31bfe596fb9ae776b439d SHA-256: cb5f5d5319e8f205ab8cb2eb62b8dcb3719b2c131a32b2e7c4c59df684c72368
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=sembolik+mant%2525C4%2525B1k+sorular%2525C4%2525B1'. The document body, though heavily obfuscated, also contains this URL, suggesting the document's primary purpose is to redirect users to this malicious site. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO poisoning tactic to obscure the malicious redirector.

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.com/wix?keyword=sembolik+mant%2525C4%2525B1k+sorular%2525C4%2525B1
    • https://static.usrfiles.com/ugd/b8c837_886c79b0d0ea46f991cd3efe39c99d4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_65242c9da00b488a82eb34ecaf09c1ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f59dcc6f09e496f9b992b449d9a0371.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/ludus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/brinkmann_electric_smoker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/speed_car_game_pc.pdf
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c71cc29711f14ec4a8c7d5365db5f530.pdf
    • https://static.usrfiles.com/ugd/b8c837_97bb5a741a0e419a82bba4f1c117ca3a.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/32187279675.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/9069703623.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/fomesakedisapeduligaze.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_off00004983.bin
2c7ef6b236d27fe2cad3823baadd6adb03334c1a06f82d4f3224c0b666400312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4983 5172 bytes
font_01_sfnt_off00005af8.bin
5ee632a625bdf3f496b5c8748f55bd3acc71aeb7ac788e3ec37bee403f1e48bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF8 11536 bytes

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