Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc98986ad8319bf1…

MALICIOUS

PDF

71.7 KB Created: 2020-08-14 22:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5143a065e6e20bb55b91bfd78d0df712 SHA-1: 3fd65e28fcf537568667beebbb0d14943d9ffb82 SHA-256: fc98986ad8319bf188e601f25b9384c53a1c2bd501351faa56515e42ef65da36
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=hateful+eight+extended'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with 'https://cdn.shopify.com/s/files/1/0428/5952/8355/files/zalerov.pdf' being the first identified. The document body, though heavily obfuscated, also contains the redirector URL. These findings suggest the document's primary purpose is to redirect users to malicious infrastructure.

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.cc/pify?keyword=hateful+eight+extended
    • http://files.studiosouthon9mileroad.com/uploads/1/3/2/6/132681985/nidifegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/zalerov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/wugunu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/49729536900.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/fesamotoman.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/placenta_previa_ultrasound.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/18774809646.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/36327669416.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/76151860910.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/1764573501.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/newukexop.pdf
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/colors_of_the_wind_piano.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_off0000dd3f.bin
fc4573aafb4fb17a98e7f8019bb4d482631711e233d58aed311b93fb090a6eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 4924 bytes
font_01_sfnt_off0000edfd.bin
f995d339cd32eee745b2753b79af2c945dfeb6003eb159e09df35abd1b81b5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 10536 bytes

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