Malicious PDF — malware analysis report

Static analysis result for SHA-256 475c88fb8a48b809…

MALICIOUS

PDF

43.5 KB Created: 2020-08-12 16:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000418259e797ddf33340e06219e0b0c SHA-1: d04eaf438cfcf3c6a24046eb3d225088b91d857f SHA-256: 475c88fb8a48b809603ceeb1a6dea62d7153714922f214df137a6b68382437f3
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a tutorial for "Autocad architecture 2020 3d". This indicates a social engineering attempt to lure users to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. No scripts were extracted, but the presence of a malicious redirector and the document's deceptive content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=autocad+architecture+2020+3d+tutorial+pdf
    • http://files.riataliadesigns.com/uploads/1/3/0/7/130776787/6486797.pdf
    • http://files.robirie.com/uploads/1/3/1/4/131410007/4828545.pdf
    • http://files.advent-baltimore.com/uploads/1/3/0/7/130738719/6ce43b.pdf
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/54005962308.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/velomop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/22933401766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/41252414583.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/66496508212.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/69794362745.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/38279453817.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/16653413632.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/jobixemotovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/website_als_chrome.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_off00006106.bin
328e3f5c16c35262b5758344c85cfebadb441c6d13a77abdb7169da270df2331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5268 bytes
font_01_sfnt_off00007301.bin
3c8cfef25d29a88fe30b940b1e75bd566f9ad500f684e69097febdc99b14474b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 9284 bytes
font_02_sfnt_off000092da.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92DA 4324 bytes

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