Malicious PDF — malware analysis report

Static analysis result for SHA-256 2326be14c21e718a…

MALICIOUS

PDF

50.6 KB Created: 2020-08-04 08:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f022e5cca67aaa9a35a7c892e62800f SHA-1: 34d522605dc2b70dbb955b5340f57948478c6e5d SHA-256: 2326be14c21e718a272bf2a6f46aca4acb8d263d9d4be4636f006fadb1d6f33f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. 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.ru/pify?keyword=tumor+solido+pseudopapilar+de+pancreas+pdf
    • http://files.beenwheredonethat.com/uploads/1/3/1/6/131636808/lilika-wezivute-vavudigu.pdf
    • http://files.kristinacourt.com/uploads/1/3/1/0/131070526/717bcbe3b2f.pdf
    • http://files.briannedempsey.ca/uploads/1/3/0/8/130814058/568c6b004501a8.pdf
    • http://files.greenvalleygrowers.com/uploads/1/3/1/8/131871586/c9edbb1beb999.pdf
    • http://files.rollupfoodtruckmenu.com/uploads/1/3/0/8/130814169/ralepoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/nixuwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/wokagisez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/59895942441.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/81950589479.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peregomosurexezobosezob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/nalopogoforixukomavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/66758067492.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/free_metro_boomin_drum_kit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/96229535562.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/8844831736.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_off000086a6.bin
f74ee8c93e8ac8a0dc3e96dc2ecf8594c867b091de6c70c32f4ee10e9c0b55ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 5248 bytes
font_01_sfnt_off00009864.bin
c93fe4798e24f7a2e6997090e42656189d7acf0268fe432fc4289aed5eb3e444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9864 10872 bytes

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