Malicious PDF — malware analysis report

Static analysis result for SHA-256 337e6ab4f97a60f5…

MALICIOUS

PDF

32.5 KB Created: 2020-08-18 23:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b07c33dfd3adc7cab27042dcdcb8ffcc SHA-1: 2e9714ededf9a143fc0b92f8420f81a0f6d988cc SHA-256: 337e6ab4f97a60f59ab4ec4f11f1b3ab3b4a788cdb914e8383700ab229c6d400
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common technique for SEO poisoning and redirecting users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=arapahoe+basin+trail+map+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a link farm designed to attract traffic and potentially deliver malware. The ML classifier strongly supports the malicious nature of this PDF.

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=arapahoe+basin+trail+map+pdf
    • http://files.biblesforasia.com/uploads/1/3/0/9/130969506/derezowave.pdf
    • http://files.mmetthey.com/uploads/1/3/1/3/131380870/fowidifowupeg-gamilaxumid-fasekurodib-kekaje.pdf
    • http://files.redkora.com/uploads/1/3/1/3/131382470/4269323.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/td_ameritrade_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/ti_nspire_programming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/wiwusizusetalimuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/50780422394.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/17673500658.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/24745358762.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/rodomimuxi.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/56219266111.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_off0000418b.bin
722804608a3b0b8f8605d39bc497368ac95ea36189acef690f8ae63e3d877285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x418B 5412 bytes
font_01_sfnt_off000053b9.bin
0c13a9ce7eb7764d24c1e51aaf26d9191c756df28e2447b470f9f817bd8fabb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B9 10048 bytes

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