Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a965fa0fa2df8f…

MALICIOUS

PDF

48.9 KB Created: 2020-08-21 23:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3379aedb9d0da7fb3ba9de4304f86bf SHA-1: fbc25e37312a4bb399e778ab69b4e1f72177931a SHA-256: 36a965fa0fa2df8fd95b7adbd49e340e52533870b9fc9f83026ad8daf351d6d6
150 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 and a PDF link farm, indicating a deceptive lure. The embedded URL 'https://ttraff.ru/pify?keyword=wedding+invite+template+wording' is directly linked to this malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to trick the user into navigating to this malicious site.

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=wedding+invite+template+wording
    • http://files.coprocartel.com/uploads/1/3/1/1/131163684/9925431.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/13659530621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/20331470488.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/91050606509.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/59353563576.pdf
    • https://cdn.shopify.com/s/files/1/0438/1186/4738/files/24697832043.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/77286683895.pdf
    • https://cdn.shopify.com/s/files/1/0429/6658/1407/files/net_framework_v4._03019_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/macroeconomics_krugman_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9692/3555/files/37641261960.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/jutubokesatuzadosu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/exercice_verbe_etre_et_avoir_ce2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/rafivu.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/
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008230.bin
4372ec0dbab17477486327a3d4de949017cc49bf1d4c993ab759dc43ceeb7543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8230 5264 bytes
font_01_sfnt_off0000941a.bin
a4993a61a6fa5f7ea9b4991dd05082e5a951157c0dc5bd3905438da42065a98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 10120 bytes

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