Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d51582535abe2c1…

MALICIOUS

PDF

42.2 KB Created: 2020-08-28 06:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052451f3bb7095a1b63e26e5736012b6 SHA-1: b7f16fbca22b76ff354faf59f656e73e66b2c9e4 SHA-256: 1d51582535abe2c1f633f940a22be9723850477238b8eec4438983a2d4b11a8d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves a link farm designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=blood+of+a+thousand+stars+pdf
    • http://files.sdicebox.com/uploads/1/3/1/8/131871786/ronobujudixijubes.pdf
    • http://gibeno.tarnaturals.com/uploads/1/3/2/8/132814170/4056958.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/tuxudazelerakimivega.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/geribumarafagawugapig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/86006376181.pdf
    • https://cdn.shopify.com/s/files/1/0462/2090/2553/files/bill_nye_biodiversity_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/xanavopajil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/minecraft_ghost_skin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/xesororinepizisedegukevow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/nimavovija.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/novena_de_aguinaldos_colombiana.pdf
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/cisco_jabber_for_mac_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/kupumosawogure.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_off000067a6.bin
efa005503c83865e1524aee552df0e562b1f31b7a26d54972b7c24b1168c8692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 5180 bytes
font_01_sfnt_off0000793a.bin
cae064372f9fa206d98d97740ac4da2995fe36e8ce33d64e6834a4c39edf4aa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 10288 bytes

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