Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f168556f009c3de…

MALICIOUS

PDF

67.1 KB Created: 2020-08-03 02:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96b74a18b8a06374fcf8717cdf06789 SHA-1: da6093a2c940fdd047df2f4365775284f25c92d8 SHA-256: 9f168556f009c3de3740ddfd5f0bcfd5d32d111e7f63f254b1dc3e3d9a2dab65
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector. The primary redirector URL is https://ttraff.cc/pify?keyword=watch+j+dorama, which is likely used to obscure the final malicious destination. The document body contains garbled text along with the redirector URL and several other PDF links, suggesting a lure to trick users into clicking through to malicious 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=watch+j+dorama
    • http://files.francislewissocialstudies.com/uploads/1/3/1/3/131379296/zatawatakeje_lipetofolom.pdf
    • http://files.crazylecture.com/uploads/1/3/1/3/131384383/e3c1f25c0ad3f.pdf
    • http://files.dorebowen.com/uploads/1/3/1/6/131607174/3994866.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/nelopuxixurimitonisawog.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/duvaleseku.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/lixigojujizikivumitixigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/zetilipolimegidozebojuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/python_make_directory.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/minecraft_server_status_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7189/files/fovovefijom.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/merafijelexoros.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/32969545009.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/pebinu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/laregegazofexidujefep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/mark_twain_media.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_off0000743f.bin
38053563fe07764da19522d559793e19d77b8d343be371a82cca6cd43f6f815e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 27544 bytes
font_01_sfnt_off0000cab6.bin
a6ad31e7ad97cc0765a02198544003fa136827e679c17d587a3430e34a8364bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 5056 bytes
font_02_sfnt_off0000dbce.bin
6459c52eb7082ecf4861b47efaa80694d6918c758cff941d1cb3a7f572819411		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 10324 bytes

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