Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0d5985ca17bc33…

MALICIOUS

PDF

39.2 KB Created: 2020-08-08 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5732e2f7a8bf4c06a8e5e5952023e137 SHA-1: 2bcb4593d388e8b1fa4fe534402c572c2f4024d6 SHA-256: af0d5985ca17bc33a81a6b7d133a230001cde8cc948b5a726d8e784b1e17b401
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, and another flagged the document as a link farm designed for SEO manipulation. The primary malicious URL is https://ttraff.cc/pify?keyword=ansys+workbench+cfx+tutorial+pdf, which likely serves as a redirector to further malicious content. The document body, though heavily obfuscated, contains references to technical documents and the tool used to generate the PDF, suggesting a lure to trick users into clicking malicious links.

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=ansys+workbench+cfx+tutorial+pdf
    • http://files.kvrclub.com/uploads/1/3/2/6/132681210/fevavofujenawefivi.pdf
    • http://wanumine.home4youutah.com/uploads/1/3/2/3/132302921/ruluk_losutobixuxud_xafigimuj.pdf
    • http://files.conviviumwest.org/uploads/1/3/1/3/131380339/490563.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/lewuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/classes_of_fire.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/lenilejafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/bronchite_chronique_obstructive.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/stats_data_and_models_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/fuledemegerukun.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/pengertian_hak_asasi_manusia.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/sokegirezuvijere.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/tasozote.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/tajejamotitadosi.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_off00005ab4.bin
398354862a3821c0664da9d239f5c8884822b2c05d10ab8494157c679d617320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 5700 bytes
font_01_sfnt_off00006e33.bin
d4247da1df4ea8878ba43b968cd3c983fa4896e625d8f68cfcd4bcc3e09fe946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E33 9972 bytes

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