Malicious PDF — malware analysis report

Static analysis result for SHA-256 36abfed042380a4b…

MALICIOUS

PDF

59.2 KB Created: 2020-08-16 21:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f20758219b5f9b4ce9d1724e5fdbd60f SHA-1: a217c827363647cd8add5d05800b678c7e81d5ef SHA-256: 36abfed042380a4b75ba6243f399fc01de8664dbf6f89efef6e16aec3426fa84
152 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of the redirector URL confirms a malicious intent to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=sepsis+guidelines+2018+ppt
    • http://files.mwprofessionalphotography.com/uploads/1/3/1/8/131872178/12c72.pdf
    • http://koribevo.uucfgoodnews.org/uploads/1/3/1/3/131383657/6de6a127a0b87.pdf
    • http://files.amyjlane-instructional.com/uploads/1/3/0/7/130775840/sipazejirepilexubu.pdf
    • http://files.frilloblog.com/uploads/1/3/1/4/131453226/sebeduwekexav.pdf
    • http://sepapeje.dhwanidance.com/uploads/1/3/0/7/130775052/petenite.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/fda_key_answer_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8259/3957/files/53463404357.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/guardians_of_the_galaxy_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0443/8245/3926/files/states_of_matter_worksheet_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/80564917258.pdf
    • https://cdn.shopify.com/s/files/1/0434/6032/9637/files/44969298175.pdf
    • https://cdn.shopify.com/s/files/1/0433/9358/1212/files/9961820158.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/star_wars_the_rise_of_skywalker_metacritic.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3702/files/annotated_code_of_maryland.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/78658234182.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/anexo_6_oaci.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/79672519340.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/8277794309.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/10461299981.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e5d.bin
a628b0264e4772c5b1740cc9cb6c998b2c04d5052b6e56916e4ce23c31ad0d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5D 2252 bytes
font_01_sfnt_off0000a8c5.bin
4141fc08d0423dfabd2fb5e7f396b1458d12636c39d5f1b5077761c662d38132		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C5 5444 bytes
font_02_sfnt_off0000bb5e.bin
39212e7e31baece26033164e8394174aa9862811e82cef76f1dd4886910bcd7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5E 10556 bytes

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