Malicious PDF — malware analysis report

Static analysis result for SHA-256 930e07c5b0378fce…

MALICIOUS

PDF

38.3 KB Created: 2020-08-06 10:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfdc13d7a93af1b1276d9e971178b53f SHA-1: 12459fc61f518e38913402f842748eea2012e7bc SHA-256: 930e07c5b0378fce2ac38e5b118e53da79a74b3d4b8f227a2eab3d7752b30504
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.ru'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF. The presence of a link farm suggests an attempt to game search engines or distribute content broadly.

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=sample+pdf+file+download+more+than+10+mb
    • http://files.purchaseofmanhattan.com/uploads/1/3/1/6/131636725/pizug_xiluwajewufipe.pdf
    • http://files.marlaheltonyoga.com/uploads/1/3/2/6/132695451/tidoro.pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • http://dizige.grandprairietreeandlandscape.com/uploads/1/3/1/6/131636948/zuwuvuxuwa_rapebuxu_saluk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/finekugepo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6116/3670/files/compound_adjectives.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/48928951639.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/rasejesazeromawol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/7592205934.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/dibitik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/puvapilediwusejaken.pdf
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/77057432459.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/37989087899.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_off0000561b.bin
6da8ab153bb46a4ffcfd3df5a5a387bd458f476cf2985774742923c2d0070406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561B 5632 bytes
font_01_sfnt_off00006929.bin
ea2b7f550473ea7b40829b995dd6d0b0ba15723ed5cef498293d70801d9fcc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 10392 bytes

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