Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40ce3a484d7de6c…

MALICIOUS

PDF

86.2 KB Created: 2020-09-09 04:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8923c4965e0b3cb5bc69c89be25bf51a SHA-1: ce81c86a95da5a523b04dccb840b0a9ff2770dbc SHA-256: a40ce3a484d7de6cc191afb4f12b2604a9c5bf7ece5c95b65785148015f06b21
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to a malicious site via the embedded link.

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.com/wix?keyword=cervical+cancer+information+in+kannada
    • https://static.usrfiles.com/ugd/e3c460_9cdac99cc96b41e89a9ef589d437e0bf.pdf
    • https://static.usrfiles.com/ugd/98e298_443f3eca98b34ee9b6bc40900c2f1ba6.pdf
    • https://static.usrfiles.com/ugd/b52961_fb30a497d778422b9d419bb8e117bb6f.pdf
    • https://static.usrfiles.com/ugd/ea2c45_14c0f44d96cd4c399f406051f8d7093a.pdf
    • https://static.usrfiles.com/ugd/ede58b_56b2edc2a0ab40f88c07d86a47aeb8a5.pdf
    • https://static.usrfiles.com/ugd/4c7633_5fd2a695ca9e41e29ff152b3b73d42cc.pdf
    • https://static.usrfiles.com/ugd/9df9d6_4deb09101d05435e8922e46d63a787b8.pdf
    • https://static.usrfiles.com/ugd/cb4a18_efe0450b25274bdaa1a6741342e3f2e6.pdf
    • https://static.usrfiles.com/ugd/a18aa6_4b19c8b27b69464aaf602878d9d21460.pdf
    • https://static.usrfiles.com/ugd/b8c837_c955d6ea69c6471c92760c29f8a56154.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/14490283138.pdf
    • https://cdn.shopify.com/s/files/1/0429/5596/4569/files/20196589874.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/marvellous_technique_for_ielts_writing.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_off000113bb.bin
39fe40d8b5c0e6fd74a869a913da68dfd90a22dfeb6f5bf1a9484324d27ee54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 5020 bytes
font_01_sfnt_off000124bf.bin
d88a5a2100b692f9997ce837bc5448f3f37716e908e26b490c0de64786b0088a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124BF 11504 bytes

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