Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb066f539fe3fce…

MALICIOUS

PDF

42.8 KB Created: 2020-08-22 10:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9de688cfe6c3d61b0b447da4ca76285a SHA-1: ff2cd0fea594ff1bdb6ff2e5a95986c5fe7c7795 SHA-256: cbb066f539fe3fce7326df99ce19a70e55c1b195fecd8a41003f7fd5845567d8
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a business English book, aiming to trick users into clicking the malicious URL. The presence of a link farm further supports the malicious intent of redirecting users to potentially harmful content.

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=intelligent+business+english+book
    • http://files.artcreate.org/uploads/1/3/1/4/131438188/7db26f5c97012a.pdf
    • http://files.lightenlifewellness.com/uploads/1/3/1/3/131379183/6184693.pdf
    • http://files.coastal-curators.com/uploads/1/3/1/8/131856125/f895a814463e.pdf
    • http://febotojuv.wanderingrae.com/uploads/1/3/0/8/130814328/2629034.pdf
    • http://kotapeg.melgough.com/uploads/1/3/0/7/130776046/3e354348046.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/17527153356.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/jardines_colgantes_de_babilonia_historia.pdf
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/73333257011.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/32243086414.pdf
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/88182432176.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/38647523307.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/absorption_and_marginal_costing_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/ritububafaruzibotoxepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/traditions_and_encounters.pdf
    • https://cdn.shopify.com/s/files/1/0437/2827/3562/files/70846109395.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_off000069fc.bin
845af90bd843ad88b9596a1d31643376d5437ec2c6781a3f22077794113c0d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 4784 bytes
font_01_sfnt_off00007a3c.bin
2bb9d94b89812a8beeca43085aa1e3ef05bf43393090610a34ad220dad0689fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 10548 bytes

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