Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6cf055d4061393…

MALICIOUS

PDF

44.0 KB Created: 2020-08-14 21:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9180d516140973034e2dd08500d0907 SHA-1: 29904e70a2ba94363a06d095159a197c6defee6f SHA-256: bb6cf055d406139393e4acd0c08d4e8fd48bce5cf7bfaf0c4eb7a7b9f1a0848a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning or redirecting users to malicious sites. The primary heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to drive traffic to this malicious infrastructure. No scripts were extracted from this sample.

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=html+table+border+not+showing+in+pdf
    • http://files.johnphilliposborne.com/uploads/1/3/0/7/130776712/liwebukepolal.pdf
    • http://files.2rpace.com/uploads/1/3/1/3/131384335/vigusol.pdf
    • http://kabejis.dovianwo.org/uploads/1/3/1/4/131406285/zimop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/muvakuxijodidas.pdf
    • https://cdn.shopify.com/s/files/1/0450/3647/0430/files/nbi_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/xuvure.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/riwubitefurozobuserumumur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/81407918015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/20699197820.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/83723774421.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_off00005fb9.bin
16a7aebfb528add73f2ba34cd93b01c19cce8f64fe93ab69d6e3f3bc8fe79a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 5648 bytes
font_01_sfnt_off000072c7.bin
cf2655bd9915ad7b21b7490ac47912beb64de5fae9143b9a53eeeedae610266c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 15668 bytes

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