Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f172c40eb025fb7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-30 22:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754b601333ce4c3e2a593f92a8af704e SHA-1: 6edfb919f83d3de08ee23239afff6f58a54a3ebf SHA-256: 9f172c40eb025fb74fac96b52bca69cb30c50a3a394f4729f199536994a984f2
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=kamu+maliyesi+ders+notlar%25C4%25B1'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://static.usrfiles.com/ugd/b8c837_54bb935487d941cd992c41dafee2c840.pdf'. The document body, though partially obfuscated, contains text related to 'kamu maliyesi ders notlar' (public finance lecture notes), suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a phishing or redirection attack.

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/wix?keyword=kamu+maliyesi+ders+notlar%25C4%25B1
    • https://static.usrfiles.com/ugd/b8c837_54bb935487d941cd992c41dafee2c840.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a7e1e6740884eac8f9165b3e521ea21.pdf
    • https://static.usrfiles.com/ugd/b58d21_0feb214264cc4bf0b7e2db38e62f7dcf.pdf
    • https://static.usrfiles.com/ugd/934fc3_89076706df21469bba366ca61bb03986.pdf
    • https://static.usrfiles.com/ugd/90c678_843b7f6607144341afc6546827db7ea7.pdf
    • https://static.usrfiles.com/ugd/0779a3_6d7906e3fea242479e1a0577475e3a18.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/jagazamavetotumikar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/gadavilaluxiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/contemporary_nutrition_wardlaw_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/riesgo_cardiovascular_global.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/paragraph_transition_words_for_essays.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_off00007a34.bin
a29e8f775aff98a071cb96f8fe4f4f9b6b39197a48ceb922b25707a11e5227c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A34 5076 bytes
font_01_sfnt_off00008b69.bin
339d40842cdb58d6909e0bfc512e30b24928795fa19b725ff0646c0219df999b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B69 12128 bytes

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