Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa86a9362d58b5a3…

MALICIOUS

PDF

52.6 KB Created: 2020-08-30 08:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 824f6fbcad0cad33c9fdc634b6996ca4 SHA-1: d6e12ed34f80201ae92e2d3a44d8bdc9082157cf SHA-256: aa86a9362d58b5a3f4169e00a0c0af55ceafe62e99b548ac39e982749746c118
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used to inflate search engine rankings or redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=tour+guide+liverpool', is flagged as a known malicious redirector. While no scripts were extracted, the structure and the malicious URL strongly suggest a phishing or redirection attempt.

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/wix?keyword=tour+guide+liverpool
    • https://static.usrfiles.com/ugd/9b5f63_1d88939da84e4a6e812f400e4bdf6bed.pdf
    • https://static.usrfiles.com/ugd/3b47cb_c8eba248a506403ba4dfd5343b30fdeb.pdf
    • https://static.usrfiles.com/ugd/12f4eb_77101fb85cdf4746ba606ca25509a333.pdf
    • https://static.usrfiles.com/ugd/fa6f14_6e9f1543b5c3410382c2a1d839a856e7.pdf
    • https://static.usrfiles.com/ugd/9c43ec_72bbb2709acd4ab08a2885a3450c538c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3eccaf156e4af7859294b9918a49ba.pdf
    • https://static.usrfiles.com/ugd/912de2_507c41aad18440e7b710fd9e518eed0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bf5f0542ac040e7a0fded49a6d5ec24.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_off0000925f.bin
4dee15eebe095ef9d74f80d249792de3a6646ccc05027a9ca55a1a8528d86e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925F 4748 bytes
font_01_sfnt_off0000a2a2.bin
95bc06fc9fec9649e6677f21ea81cc385d00f09fc090c9fc2e3cb47720f6a281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A2 10408 bytes

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