Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ecbbfd3a9380c67…

MALICIOUS

PDF

66.2 KB Created: 2020-08-17 14:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e9f97a6dab7f5ac30b1fce7b0f24972 SHA-1: 6953b07135b79fa6c67c423d277c2fa9a1141b68 SHA-256: 4ecbbfd3a9380c6713f16e5e043145c2a32ea693cc3da73354b2f74333a24e55
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector associated with 'candida infection'. This suggests a phishing or scam attempt to drive traffic to malicious infrastructure. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO manipulation or to obscure the final malicious destination.

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=candida+infection+pdf
    • http://vowutujut.newtonhillckd.co.uk/uploads/1/3/0/9/130968996/602eeda0a45.pdf
    • http://files.joyousdino.com/uploads/1/3/2/3/132302735/687a2559e25e.pdf
    • http://mipadudu.devonportanglicanchurch.com/uploads/1/3/2/3/132302857/wufebubupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/tananumegoriwazolazejewoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/weather_channel_lincoln_ne.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0839/files/voladamege.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/71532220368.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/regal_bread_makers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4917/files/kubota_l2800_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/95614435634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/pisawupezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/marketing_communication_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/molubefug.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_off0000c5f8.bin
bc6e79645030a02209df1c322fd989e95798476f5030d0c40c5cb819748f9ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F8 4748 bytes
font_01_sfnt_off0000d635.bin
f4f18960bc6200e8d615c63d799a9ce9ca861e9402357f3d57377a6abeca025d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD635 11572 bytes

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