Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86542ed61d0b981…

MALICIOUS

PDF

52.3 KB Created: 2020-08-12 20:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79bf7b6a6468d37167c8e4bb59996ba4 SHA-1: 66ad2ff100310985f7ba31170603d4d1d2be6b19 SHA-256: b86542ed61d0b981c7fd777461d4d5a9f6260e7b929bcfe136d4cfde7f9f1202
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, likely for SEO manipulation or to obscure malicious intent. The document body contains the primary malicious URL and a large number of other PDF links, many hosted on cdn.shopify.com, which is a common distribution point for malicious documents.

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/wb?keyword=resolving%20conflict%20worksheet
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdf
    • http://files.dasmith.ca/uploads/1/3/0/9/130969498/3930238.pdf
    • http://files.khemkhon.com/uploads/1/3/1/0/131070618/junogilaril.pdf
    • http://files.herbalbeautysoap.com/uploads/1/3/1/6/131607131/7365de.pdf
    • http://files.standrewschurchdonald.com/uploads/1/3/1/4/131482954/fatafutowuwo-felelomegopine-kabesuvofowob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/sims_4_grafting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/bivivixopufuwekozig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/how_to_write_a_book_about_your_life.pdf
    • https://cdn.shopify.com/s/files/1/0432/9111/5678/files/brachycephalic_syndrome_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/21364786092.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/berawidisibukitadof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/nujuraxojevexodiganunakul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/jeduze.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/zolozilalipuvagafifane.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/9054141409.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_off00008f5c.bin
385f5dfc7148eef7016f3a748ea7a753e3434d220a7c7e66a51add213f4930ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5C 5156 bytes
font_01_sfnt_off0000a105.bin
cc1bac533175a05f4c598de6d8efc068d2862f94a0cd41d970b56b3c9e997530		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA105 10368 bytes

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