Malicious PDF — malware analysis report

Static analysis result for SHA-256 4373033ba46d4d87…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 18:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b9a36d1f3f17527697ac7f61102e071 SHA-1: a6f00ce9c0e164a2c607ece7ece17652392885c5 SHA-256: 4373033ba46d4d87557d866a455e56aac8c0b354ff4173b03a0caf39d75df296
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and references a "queen gambit declined pdf", suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but one critical URL to 'ttraff.com' is identified as malicious. No scripts were extracted from this sample.

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/pify?keyword=sadler+queen+gambit+declined+pdf
    • http://wuloxomab.willtaylorandstringsattached.com/uploads/1/3/1/1/131164250/9210442.pdf
    • http://files.purduebap.org/uploads/1/3/1/4/131483372/wilavisapeja.pdf
    • http://jujotireg.paragonpipeline.com/uploads/1/3/0/8/130814328/doravebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/addition_with_carry_over_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/dubukeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/87837342940.pdf
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/hughes_hallett_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/auto_dwg_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/60028030544.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/neurological_examination_osce.pdf
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/4342435931.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/jquery_ajax_download_file.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_off000052bf.bin
014c03b2802aa11fd157b40c6095bfbddf9bcf04d3ee4edc812c532e22ce5574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 5436 bytes
font_01_sfnt_off0000650e.bin
a28728221af3fab0e52bd5f2147994c3e627d53265facfeee274d39a1937adbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 10384 bytes
font_02_sfnt_off000088a4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 4324 bytes

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