Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89453d77acd02cf…

MALICIOUS

PDF

35.6 KB Created: 2020-08-29 09:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862aadd9a92083642a18f898c15212b2 SHA-1: 39f73dca97c5d5eddca5529fa394f5d2707b2ccd SHA-256: b89453d77acd02cf0c3174561e3c9d01528f381f56ffd81c2c5cf1c7c7f94b8a
140 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is associated with a callback phishing or tech-support scam. The document body, though partially garbled, contains text related to 'Skylight bank number' and includes numerous embedded URLs, many pointing to static.usrfiles.com, suggesting a link farm designed to obscure the ultimate destination. The presence of these elements strongly indicates a social engineering attack aimed at tricking the user into visiting a malicious site.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=skylight+bank+number
    • https://static.usrfiles.com/ugd/b8c837_915199595cb647fd8b5674d56b072ac8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c098c1abc0841e68681a2d5887ad883.pdf
    • https://static.usrfiles.com/ugd/b8c837_01bf716fa43747cb81617682ec72c318.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae0dcf5291a4fcabc2834b713c7466a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a97515deabf44a8f893645208f2536d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4044c70bd1634e7f91176e2bca3425b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_731e1b0d333c4dd38ec2276b9facd019.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8a7595f5f2a47f0b8b9fe17c4e4072b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e4535b03d7846478409bbabe49bafdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fe9ca3e4ebf4cb6be6b9aff8f9824a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d92ad30fac2644a2bd6569eb96969c32.pdf
    • https://static.usrfiles.com/ugd/b8c837_da184cc2007d4a55b383342e8a576f75.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_off00004d67.bin
dd1c8072dad4e2980ca7b5eec9d7b90da6d7930208c50753d8edd0f2258c2c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D67 5328 bytes
font_01_sfnt_off00005f61.bin
837693fab02eb560bba4da35e033764df67ebeda81134aa885010149df41d83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 10280 bytes

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