Malicious PDF — malware analysis report

Static analysis result for SHA-256 e419fb18d09c444d…

MALICIOUS

PDF

69.6 KB Created: 2020-11-01 08:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08feafda5d91a2c4ad0077140cdac182 SHA-1: 72d2cbb589f47db96643f4446dfe8a4142501598 SHA-256: e419fb18d09c444d374778860108a8ca0e31905e608dfbb2cdcfd63859cd6f4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://cctraff.ru/aws?keyword=parametric+equations+calculator', is flagged as a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cctraff.ru/aws?keyword=parametric+equations+calculator
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdf
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5f9cbe9b231f7.pdf
    • https://janukavosoxavu.weebly.com/uploads/1/3/4/3/134318620/bezewubaw.pdf
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/pulaz.pdf
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/1823f3a910c0016.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f91ee520ea2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d941848-a005-4d3f-87f6-238e681c99df/download_from_nicovideo.pdf
    • https://uploads.strikinglycdn.com/files/ffe1a6ab-e332-4a03-bf6e-44768b111182/66055398935.pdf
    • https://cdn.shopify.com/s/files/1/0481/2000/4761/files/wunuwuwomovufetigazas.pdf
    • https://uploads.strikinglycdn.com/files/9ee7c2cc-c180-4b20-85d6-92bc359cc57f/62377211477.pdf
    • https://cdn.shopify.com/s/files/1/0482/3331/6514/files/jiwubofujazanujudoriduxu.pdf
    • https://uploads.strikinglycdn.com/files/8d5d4cfa-a9ab-46ed-84ed-d832e024f031/pajavasunepug.pdf
    • https://uploads.strikinglycdn.com/files/eec44431-7d40-4842-a8c0-5fd846f0572f/zavaxisovup.pdf
    • https://cdn.shopify.com/s/files/1/0501/1747/6545/files/writing_net_ionic_equations_worksheet.pdf
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c6.bin
3a3c7202cb42d56e258006d89c3b2a455cb84bdc916bda8f74a70e7a06ce3335
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C6 5072 bytes
font_01_sfnt_off0000d3f0.bin
5d91d0bdcbda1ea7b6c332316fc479d36b347d60e2be96343d423aafadab0b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 12968 bytes
font_02_sfnt_off0001006d.bin
4b441578987931e3d7a3d9f58de42cc39f3203463576faf1f0f9af5fbf93127d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 16092 bytes