Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90b074d13f5464b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 22:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a46deccff730858922fa9fd666aa8d52 SHA-1: 6549b543fc19db3eaa59a9e5eb98d33deb7afe98 SHA-256: d90b074d13f5464b53b7fa57871ef5deb75d20d3f2108531a31f3f1eeed4a627
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body text, though heavily obfuscated, contains references to URLs that are part of this link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=html+form+checkbox+radio+button, which is designed to redirect users. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's content is intended to trick users into installing something, likely leading to further compromise.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=html+form+checkbox+radio+button
    • http://files.ntangi.com/uploads/1/3/1/6/131607407/folizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/xutis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/76917059358.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/naxadeveliwadijaxoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/8260051050.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/photoshop_cs5_keygen_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/xuwuzikobugizusexog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/factory_five_mk4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/cakephp_3_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/lekerolasid.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_off00005907.bin
669b7279baa9b2c1c36af63e74f4fd22e3d0d0be2de4554d28b5f74292b6e4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5907 5316 bytes
font_01_sfnt_off00006af2.bin
0f9adbc8f1b6f7bb60df07e5ba1ac052f958238a17cd014a21c46e634e1a18d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 13940 bytes

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