Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae18bf66ed183169…

MALICIOUS

PDF

45.8 KB Created: 2020-08-15 02:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 014f924bf5b72e24bec5c1d41c2943f0 SHA-1: d65f2ea379fe2545e7557f1fd87b5e9c2b396924 SHA-256: ae18bf66ed183169576d80278e175da9c846c77f1c0c0c5356d94bd8192c8eac
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, pointing to `https://ttraff.ru/pify?keyword=best+animation+software+for+android+development`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on `cdn.shopify.com`. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content.

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=best+animation+software+for+android+development
    • http://files.thermage.sg/uploads/1/3/1/1/131163687/3557336.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/79254462203.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/make_unique_c_11.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/akademikong_pagsulat_halimbawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/basic_cantonese_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/cracking_the_code_by_ayushman_khurana.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/masuvokenov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/misovugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/34704216482.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/craftsman_radial_arm_saw_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.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_off00007466.bin
80ea92857d574a9a21be8cb3954469f1c328fb8827454d484204b4b7ae157983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 5388 bytes
font_01_sfnt_off000086ba.bin
8f0f131974832b0300f21aa1ab03e44193346abdc621b87d5a3627a053666ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BA 10388 bytes

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