Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9ffa44bbe8bebe…

MALICIOUS

PDF

31.6 KB Created: 2020-08-25 08:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd106e431ad78afda9721cebefa8f4c SHA-1: fc20e6fa4108c1febfd2af5a131bbecd5d1302b3 SHA-256: ed9ffa44bbe8bebe38cdfa6dc4ab831775190adba02d102c22b79a6bb85a6a45
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with multiple links pointing to Shopify-hosted PDFs, suggesting an attempt to obscure the true malicious destination. The document body contains a call-to-action phrase, reinforcing the lure. The primary IOC is the malicious redirector URL, which likely leads to further malicious content or phishing attempts.

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.com/pify?keyword=i+want+to++zalo+app
    • http://files.ceblankenship.com/uploads/1/3/1/4/131406592/kuzixove-wafisipikag-duzapitod-sitaxowozesona.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/formal_letter_for_request_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/1338/2044/files/annotates_in_evernote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/9133893433.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/90789029219.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/28825718335.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/lubogujov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/lopatabomabiditexalakadul.pdf
    • https://cdn.shopify.com/s/files/1/0450/4626/8054/files/regebezoka.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_off00004092.bin
67fe7febc41a515ebe818b84a8b49d5a19a5d734630b6f3aef59cef59eb58aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4092 4616 bytes
font_01_sfnt_off0000506e.bin
bacdca6adb4d903f523b8283b725fd9732dff1eb5844e3ceabf2c727b57e7dfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x506E 9840 bytes

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