Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3de9be6b92fbd3…

MALICIOUS

PDF

40.1 KB Created: 2020-09-01 03:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d58b46ecede87614c55ad3636f9733 SHA-1: 51dd658763388c06990414f124794a91854410b8 SHA-256: 2c3de9be6b92fbd38a58fb3a590076f030dd78288a231b2f5e1e784ec657b11c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=skynet+sports+tv+guide'. This URL is embedded within the document body, suggesting a social engineering lure disguised as a sports TV guide. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign PDF files hosted on cdn.shopify.com, likely for SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=skynet+sports+tv+guide
    • https://static.usrfiles.com/ugd/278743_b37f44edf6fe4433aae67a5c62be7f73.pdf
    • https://static.usrfiles.com/ugd/b8c837_57f863d9bab34c468be7b9f1bb901095.pdf
    • https://static.usrfiles.com/ugd/95089d_b0d2f53341c447d3b36d619107bebf8e.pdf
    • https://static.usrfiles.com/ugd/c33cdb_ca81593168d34c79b74609b057e31db9.pdf
    • https://cdn.shopify.com/s/files/1/0464/8629/0584/files/94405621662.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/madabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/lettre_de_motivation_candidature_spontane_banque_sans_experience.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/82479392785.pdf
    • https://cdn.shopify.com/s/files/1/0433/2932/3158/files/22168353428.pdf
    • https://cdn.shopify.com/s/files/1/0428/4402/9084/files/australia_tv_guide_qld.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/the_cartoon_guide_to_statistics.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_off00005f16.bin
afdf220218cb0f2fa99270a5907d87e6a1256cd161103b457e5f1c35e424d021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 5216 bytes
font_01_sfnt_off000070fa.bin
661718304b4204a720864aab10ccef3adf0ac104c1056516f63e8296cf15afe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 10228 bytes

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