Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dadfce11c26a8a0…

MALICIOUS

PDF

60.3 KB Created: 2020-08-29 23:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73db8d9288c8fdd4679feaa8459a3943 SHA-1: 02e0a06293f82fd5ffd561fb3bdf13ff946db8aa SHA-256: 1dadfce11c26a8a0d46c08da9600de921e98af7dd2569d9df926393f3ddcc4f3
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used for SEO farms or to redirect users to malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=estudiantes+del+islam+crucigrama', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains the same URL, suggesting it's the primary lure.

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=estudiantes+del+islam+crucigrama
    • https://static.usrfiles.com/ugd/f515ca_b035a855a60c4eea9fa2dadb6e19bec8.pdf
    • https://static.usrfiles.com/ugd/f4de5e_45049416c49d40cbaaf81bbcefe35ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6996b0aeb414ba187fda129a4b369d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb182faf500d43258938161b721e2c6e.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/17940976849.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/babepegiveze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/gregorian_calendar_2020.pdf
    • https://static.usrfiles.com/ugd/cf14a4_49ea903992a14f15b9df2a506e039ef0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000958c.bin
35c0dbd89288dc233d4429e44c23485d7dea08805fb52fd0520ea69ad39dae63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 5216 bytes
font_01_sfnt_off0000a725.bin
18e0a6a9382641f8f8c02cb85aac13849f585eb891a2eb0a50b5aedf03331224		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA725 11692 bytes
font_02_sfnt_off0000cd65.bin
967d89e51290aceb8fea09c2f9e0c707663cecf1a9b826b2128538f448fdbc28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 16164 bytes

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