Malicious PDF — malware analysis report

Static analysis result for SHA-256 925e17e2cc15b082…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 15:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa398cd04d086b277c753a1c4cdc2170 SHA-1: 7af5377be07c1a41a47bab2d059fe3664f9f5419 SHA-256: 925e17e2cc15b0824780b97f245a1112ba787d646ef829d2afaaad854ad1c761
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting a lure to external malicious content. The ML classifier strongly indicates malicious intent, and the presence of a link farm further supports a distribution or phishing attack pattern.

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.ru/pify?keyword=causas+del+abandono+escolar+en+mexico+pdf
    • http://files.beggslab.com/uploads/1/3/1/3/131383760/xakapemegojawutopulo.pdf
    • http://files.fortwayneptacouncil.org/uploads/1/3/1/3/131380480/doriresososibozaru.pdf
    • http://files.capturingmomentsblog.com/uploads/1/3/1/8/131856333/d64fa7.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/vejapagafobi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/gungeon_gnawed_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/26274327047.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/63058123949.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/96329636313.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/91533656945.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5004/files/miller_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/gepidefalasurolamusogetin.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/wilutukowiminakomofumub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/xavemali.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_off00006543.bin
81245afd95ea96c351106658f4dce918438d80aec475e43eb330bc03d40c0e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5416 bytes
font_01_sfnt_off00007791.bin
6b4bc7c3d1927d91d2dd4ebd80f092cd2df085f006089655a3eadf73a43952d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7791 10208 bytes

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