Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5a35d424d4383d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-28 12:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43249c14a56c16d9f84c512080404705 SHA-1: f9db9b17ddd27f802229e1c20876cceead7830e6 SHA-256: 1f5a35d424d4383d4548d20a74b02573c1b3f208275ca06a97aef0f8b4f96e86
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=exercicis+de+connectors+catal%25C3%25A0'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0429/2666/9987/files/65829950567.pdf'. The document body, though partially corrupted, contains references to these URLs, suggesting an attempt to lure users to malicious infrastructure.

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=exercicis+de+connectors+catal%25C3%25A0
    • http://files.naturaleducators.com/uploads/1/3/2/6/132681479/xuxosawojesabugol.pdf
    • http://files.marketing-truth.net/uploads/1/3/1/0/131069879/9629543f0.pdf
    • http://files.buybendhomes.com/uploads/1/3/2/6/132681150/suwoladutexewid.pdf
    • http://files.brewwber.com/uploads/1/3/1/4/131437733/cf58a.pdf
    • http://files.redeemergastonia.org/uploads/1/3/1/4/131438157/vivifipezewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/65829950567.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/gowarajaja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/68382726861.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/67001196693.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/rowofegowaro.pdf
    • https://cdn.shopify.com/s/files/1/0448/1410/6775/files/camera_scanner_to_tapscanner_v2._0._47.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/xigeridabizunawalezowuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/zurosawujen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3934/files/50_tons_de_cinza_completo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/minikapewotozagosivobuva.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_off00006239.bin
69e9e6700870e4ed2998f29c9b4d5a50b02d297c6d7a5505ade839356ea72f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 5192 bytes
font_01_sfnt_off0000735c.bin
c0ead2d48c4725b2d060c714584f80b3f4634a7f7f8e536fe597d77135389a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 10248 bytes

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