Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ff3396cb3c3f5e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-15 18:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ddd862c9d9aa444422c0a05fd008b24 SHA-1: 6db2cd0dc20ff23229687ad9b1b98e7312abda29 SHA-256: c1ff3396cb3c3f5e259b471b58ceb9b8624b4716559c2fffb88936f4cf381601
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on Shopify but also include links to potentially malicious domains. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=spelling+rules+ing+exercises+pdf', suggesting a lure to a phishing or malware distribution site disguised as a PDF document.

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=spelling+rules+ing+exercises+pdf
    • http://kononu.ducksoupntreats808.com/uploads/1/3/1/4/131453541/cdcfd.pdf
    • http://files.creatrixmusicworks.com/uploads/1/3/1/3/131379680/zozegabesaxa-nerepirogoxezu-nawurugalonokak.pdf
    • http://lejogite.tllafleur.com/uploads/1/3/1/8/131857445/4364787.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/71975416390.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/74415767586.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/93427121095.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/85016112885.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/brookfield_viscometer_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/40897749398.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/43688920997.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/56122011124.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/raspberry_pi_bluetooth_python.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_off00005332.bin
91c1215751d2d294a6ecc5b4c767def7af13c67c37deab0d09eeec0331fa1a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 5284 bytes
font_01_sfnt_off0000653f.bin
c8add83786900ddfc3ca767fe71caa8d2fa941cd061e1e8be18b8c977d9da0c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 10392 bytes

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