Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f63f44a9d46d25e…

MALICIOUS

PDF

47.4 KB Created: 2020-08-13 02:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96cc7b320373811a43f84d48fc819f5f SHA-1: 42cb898201fa8c7341801683608d8ebf2bf50246 SHA-256: 9f63f44a9d46d25e648d3a960fa662cd01a682c56c8ef4a5dce06aae32bd44bf
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a 'Bulletin de paie explication pdf 2020'. This link, https://ttraff.cc/pify?keyword=bulletin+de+paie+explication+pdf+2020, is designed to lead the user to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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=bulletin+de+paie+explication+pdf+2020
    • http://files.celestecrystals.com/uploads/1/3/2/3/132303175/6ccd315ab77e03.pdf
    • http://files.understandingwhowewere.com/uploads/1/3/0/8/130814758/1952452.pdf
    • http://files.limerickcommunitygrocery.com/uploads/1/3/2/6/132695572/valudofowal-xujowamujojef-kudemusat.pdf
    • http://files.dawndiezwillis.com/uploads/1/3/2/6/132695862/tazuda_wetonibojiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9678/3514/files/tezovukenisor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/gesobet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/31740552424.pdf
    • https://cdn.shopify.com/s/files/1/0441/0291/0104/files/spanish_alphabet_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/best_reader_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/43358037827.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/punctuation_in_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/95097297806.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/17551620815.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_off00007709.bin
f66cba291837b986aa243dfe135b964308d2f8d5c6b16c87d482dc2e6af9f990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7709 5264 bytes
font_01_sfnt_off0000890c.bin
a438300d14bf1e944aff0ce36820d3c0f3e1055fd273a5100f5834bfcc63827c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 12440 bytes

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