Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e8fa426415cabd…

MALICIOUS

PDF

41.8 KB Created: 2020-08-28 21:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f2547dba9533fc707c18b227d2128a SHA-1: 0eacd5f0351b76f0aa834c90c9f8faafb186ddb3 SHA-256: c0e8fa426415cabd244d1b3cb45b9f77a2a49eadbd2b21575f7f56d0f4b4c070
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary URLs, 'https://ttraff.cc/wix?keyword=middle+earth+sbg+rangers', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links hosted on 'static.usrfiles.com', suggesting a coordinated effort to distribute malicious content or phish users.

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.cc/wix?keyword=middle+earth+sbg+rangers
    • https://static.usrfiles.com/ugd/b8c837_28659cd01f1f4b75b434e49e3ee1b8be.pdf
    • https://static.usrfiles.com/ugd/b8c837_f38d507272ba4bb5ac3f24534b1883b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c03b92a567b24e02867ff4b7cdb0cf4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_60b4d206c38c471dbc1e33b39cfaf50f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c41bea29aba489cbd092bdc608078f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8800f48600f345069d2bbca9e13aedf9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4561c2183f94120b0ed500ba06b6d3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eaa2cb787b24813958636a975cbcb37.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a4c71da2b7344d285032b6f52991236.pdf
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/mitejasun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/dujedaxisubimijerof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/nifade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8266/files/understanding_mathematical_notation.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_off0000663d.bin
7efefb6acf9bc2180d7ca782a03d146ab66b0710b999ace0f0a3e9100b7292a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 5232 bytes
font_01_sfnt_off000077f9.bin
07d9feadb39f300e2e8fec0e8c6eefdce08d07ed338e8edb829523cbff45e018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 10044 bytes

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