Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b0fbb13e039cf1…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 12:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c24a6857cd098f8ad28eb3e4b60f58 SHA-1: aa3e1dc5ce7fcb4971f6973d8a84ff4a3d444a4f SHA-256: b7b0fbb13e039cf1e7db4933eb8e01726d059fd426d4a6284f35f3909c40015f
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/wix?keyword=conversational+hypnosis+course as pointing to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=conversational+hypnosis+course
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/33660372446.pdf
    • https://cdn.shopify.com/s/files/1/0432/3495/1331/files/vce_to_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/58266548529.pdf
    • https://static.usrfiles.com/ugd/7598fa_4aa40539c8ce49b48b9c19ed2b15b639.pdf
    • https://static.usrfiles.com/ugd/21a131_ef2f4510c14442d3bc93230b961174dd.pdf
    • https://static.usrfiles.com/ugd/80c1db_654aacf805df4b8eb7ff3b11fd5031a3.pdf
    • https://static.usrfiles.com/ugd/1cfe37_80cc78121ad3400db433704ac4a6aeaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c10706f4274681a2791097c196dca5.pdf
    • https://static.usrfiles.com/ugd/f09a9d_86bcf538dd4f455cabbcf21559eb00b3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/21147203348.pdf
    • https://cdn.shopify.com/s/files/1/0436/0673/7053/files/adobe_acrobat_9_pro_portable.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/kewipimom.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_off0000752d.bin
9e379ef3d6c6e26d75cdc6f37b7204bc8e14a02e55fc6244946f34daf99de278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5088 bytes
font_01_sfnt_off0000867b.bin
e3a08f83c4c1d5327772e18285cf268ae2595f89d63218a23a9fe60b469fb24a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867B 9976 bytes

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