Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95b6baf94f627ff…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 15:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d89aec0eae2caebed531eee7b8b8b83 SHA-1: 043a11aefc21ef4774516881f7f2bee7dca0f7ed SHA-256: e95b6baf94f627ffd5a6dd44c3514dfe48b03263b5920913d8d36c0d50c7b39a
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body text, though heavily obfuscated, contains phrases that suggest a 'download' lure, reinforced by the 'SE_DOWNLOAD_BUTTON' heuristic. The primary malicious URL, 'https://ttraff.cc/pify?keyword=calligraphy+writing+template', is likely used to redirect the user to a further malicious destination. The presence of numerous Shopify-hosted PDF links suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=calligraphy+writing+template
    • http://files.jeffreydscott.com/uploads/1/3/1/3/131381772/8793159.pdf
    • http://files.myrfinn.com/uploads/1/3/0/7/130738512/2f89f.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/57391083724.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/bezier_surface.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/grand_theft_auto_5_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/lisifarukavawidasupolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/33967172099.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/90089664378.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b91.bin
3fef222fecda3dcbb6d9c9ccba4db37583edbe07927f583546187bff87f55892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B91 4952 bytes
font_01_sfnt_off00006c49.bin
eab05f10c679d9098054d9b93a7b0eab19daaefd42b4798029ded0525c3d6d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C49 10388 bytes
font_02_sfnt_off00008fc8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 4324 bytes

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