Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3f2acfb75de16f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 18:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada0eed88c5de89950bb29d4c467d7a7 SHA-1: 3a4073251684387b2df828a1576c63e09a94404d SHA-256: da3f2acfb75de16f018f028ce0828bcf09593f1ee72661789a69d2bf96e4e7c2
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.cc/pify?keyword=the+brigands+of+rattlecreek+pdf, which likely serves as a gateway to further malicious content. The document body contains obfuscated text and URLs, reinforcing the malicious intent.

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=the+brigands+of+rattlecreek+pdf
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdf
    • http://files.fbclocustgrovepreschool.com/uploads/1/3/0/9/130969751/19ffed.pdf
    • http://files.davesclp.com/uploads/1/3/0/7/130775046/0c69ce0dce.pdf
    • http://files.bgecyclingclub.co.uk/uploads/1/3/2/6/132680915/5438388.pdf
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/tajepexupijiluv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/99684748549.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/monivigijemaxarinedolig.pdf
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/lemubivifizoxasexim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/lixonafawemupinezasamop.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/vujigenel.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/final_fantasy_6_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/4228/1371/files/zifogoxibunilexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/50841878503.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_off0000687b.bin
47cb57c6c8de6e5831a5e0daa55342cb1a252372a15fdf9b93c9b7b851adba67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 5572 bytes
font_01_sfnt_off00007b67.bin
1b0c9e9d09caa9ffb2239424aca9bc465ea2937a4356841a3118299e9afdb449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 9984 bytes

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