Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fed2a2144359dc…

MALICIOUS

PDF

33.8 KB Created: 2020-08-29 06:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543ae220b8dbdeb3ecf243f3a65e5d35 SHA-1: 160aa18dfa330cf88a8139eb69dca962b596845f SHA-256: f1fed2a2144359dcff9a7314de27cc9ef54b3ee74cf2bb816e7bfb33cae16f76
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying one link pointing to a known malicious redirector. Another critical heuristic indicates a 'PDF SEO Link Farm' with many external PDF links, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of these links, particularly the malicious redirector, strongly suggests an attempt to direct users to harmful sites.

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=jaid+black+epub
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/best_free_app_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/bekazixekidevof.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/26338635015.pdf
    • https://cdn.shopify.com/s/files/1/0463/6943/9899/files/mamamoo_egotistic_piano_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_39d101f5df8f412494bf6d202484333c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c970f4ca78c74065a324323e999182f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_96909f32a42a41c2bac533be2f74c901.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9014f6f1a234e708e17ecb817c429d1.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/davuroxiwomemelegefilavim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.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_off0000488a.bin
2e90601313e547b9aab0fd3b85415e1c062772a586442b8d3108e89a40e12499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488A 4984 bytes
font_01_sfnt_off00005987.bin
dad3016b9c47569ac9e7fce4b0f3f458dd40523085dc3a6bfebdbdf1f4044bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5987 9768 bytes

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