Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae672b5a57ef4945…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 21:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a557ee3fbaf393587bfb33a117b2d1c SHA-1: 80b6b22fafca7480428c1adcec0e5d0d3b64c44e SHA-256: ae672b5a57ef4945c145313f6f6cbb2dc881e6fbe54a3983bbf28abe9606e354
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF title, suggesting a lure. The presence of a link farm indicates an attempt to distribute malicious content or conduct phishing at scale.

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.cc/pify?keyword=deep+water+question+answers+pdf
    • http://zadax.hawaiiwritersguild.com/uploads/1/3/1/4/131453033/sifaz.pdf
    • http://nedogapex.trainingmadefair.com/uploads/1/3/0/7/130775388/vipubefutum.pdf
    • http://files.gcemergency.com/uploads/1/3/0/9/130969645/4181a76e3be7b9a.pdf
    • http://files.farmdiva.net/uploads/1/3/1/6/131606537/9c79c384b7fc829.pdf
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/b_form_of_dna.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8392/files/72021847717.pdf
    • https://cdn.shopify.com/s/files/1/0440/6676/7013/files/analytic_geometry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/37947363508.pdf
    • https://cdn.shopify.com/s/files/1/0463/3228/0994/files/juburevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/39992577257.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/jizaxejilap.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/trastorno_de_ansiedad_social_2020.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_off00006f34.bin
5ea573e8dc3b8585f00026b7461c04555f80d4ffe3d01dbf95f1dac0afda0897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 5220 bytes
font_01_sfnt_off00008118.bin
9dc039f8659d28498aa4a7b65ba0a681ccbbdd5049de01b7f6f4506b2feb5294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 9812 bytes

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