Malicious PDF — malware analysis report

Static analysis result for SHA-256 da144da2e0d3a90c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 03:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff8ff0a3753e6cc7a5524a1959175719 SHA-1: 414c08148d091d1cc3ec619e6f63ad07ace79a88 SHA-256: da144da2e0d3a90c1d7d83738cb317879826e719e797c7a8bf0285aab4066386
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=que+es+la+dinamica', is identified as a malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The document body itself is heavily obfuscated and contains the malicious URL.

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=que+es+la+dinamica
    • https://static.usrfiles.com/ugd/5926b4_f5de70415c4448b3a7b03e73af995a38.pdf
    • https://static.usrfiles.com/ugd/89c6ad_1230f539262741d5a30d1972d6b254b7.pdf
    • https://static.usrfiles.com/ugd/f515ca_e123f2abb8ab4c529887b721370941e3.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_b8ec42797d6e4495be9330ff54be55d5.pdf
    • https://static.usrfiles.com/ugd/83e24f_f73a8e1d98b04e95b09a9be5a6593015.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/dadipovisixipubesofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/annualcreditreport._com_reviews_complaints.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/export_calendar_from_outlook.pdf
    • https://static.usrfiles.com/ugd/9eb187_70eb27ef05044f34934055ab6c65416b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b04af9a61a4a1baa7d41cb89037e9f.pdf
    • https://static.usrfiles.com/ugd/2d1648_beabe9f906fc43469f15f2ab3eccb651.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7dec993685842a59996048e02d31b77.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f5505025d5b4854ab95cd8b73e34d04.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_off00005d35.bin
fd42390caaa5f6be3e97e31e9f74b1c8aa43330aa61a419b59fb7f64abfc3284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5052 bytes
font_01_sfnt_off00006e4b.bin
6f4ffe406024807808fff8a6e19262f3b93bb6e7711f72d6a210ae4ad460ea7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 10716 bytes

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