Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2fc8068ed72ba1…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 15:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3978d9f504c11f7bc5b510057ca7162 SHA-1: 5bf71e81be0098f58ee48cf3addfc35277db788a SHA-256: 1c2fc8068ed72ba1aa2cb285fef65544b46a4a33b2d21f329857a2033e3d3482
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=cadsofttools+pdf+a+dwg'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=cadsofttools+pdf+a+dwg
    • http://files.molecularultrasound.com/uploads/1/3/1/3/131379409/lutegorus.pdf
    • http://mivumerox.rochesterarealiteracycouncil.org/uploads/1/3/2/6/132681352/1841800.pdf
    • http://files.theislandernewspaper.com/uploads/1/3/1/6/131606490/945bec2391e.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/jugividadexabigomode.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/betadikazoxuxugorujegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/beetroot_soup_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/xaxigugesuzaruvaxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/57316888289.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/kanufes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/sakejodalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/fojifapoxumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/rojudosase.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_off00005f61.bin
8e66909ecc7ce439077efb9d73c57edbe2cee27b1f6854751abea5239802269a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 5108 bytes
font_01_sfnt_off000070f2.bin
6a0a755fcc1d04cd9d98f721621011d9a1e5e15692618693a74a2f87620fcb55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F2 12716 bytes

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