Malicious PDF — malware analysis report

Static analysis result for SHA-256 47418ff36f4ddf81…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 14:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9a7f83a91240a9836083948daa06642 SHA-1: 3bb373c37bbe4f50a1baa1852ffb4588b411a7fc SHA-256: 47418ff36f4ddf81c89aa5a3d6b5bf0cab7dd958e0c322ed43feef4f0d1a886e
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The document body contains garbled text but includes the malicious URL and references to other benign-looking PDFs hosted on Shopify, likely part of the link farm.

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=kativo+nicaragua%2527%2527s+agriculture
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/starboard_software_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/assinar_com_certificado_digital_a1.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/anatomie_du_corps_humain_en_3d_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0439/4778/6398/files/17330409262.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/82783895902.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0122d95eefc4ff4b68c9a0c0dec6ea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_976e881af58d480eb561f86e1fcba9f4.pdf
    • https://static.usrfiles.com/ugd/a467d2_05f24561ed1242eab9487ab6695d1fcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66ac0daeb2f408eb6c9e2a914be82ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_724c1e584b4c452cade4bc34705a6fc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_57137dab6b5e4bcf8e4a879fcffdeab8.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_off000062f7.bin
7db985aa0a17d3c3aab65d78c92f8e3722759844c046ffb3c35c534e60c3bd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5032 bytes
font_01_sfnt_off00007435.bin
113b8116029aae8e19fcbe5776dc338eacd7a15593e45032e5ffe4125756ea3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10176 bytes

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