Malicious PDF — malware analysis report

Static analysis result for SHA-256 9423695074da69d3…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 17:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002ca328a32d85e11a4e08fe91d71645 SHA-1: 92a9e51013ba66e79deb10c22fb32453c491b29f SHA-256: 9423695074da69d3287b9bdc4e7f43fed30bcbeea74ed8c3f69668ba5d952782
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'diabetic ketoacidosis guidelines' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to benign content, likely to mask the malicious redirector.

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.com/wix?keyword=diabetic+ketoacidosis+guidelines+2017+ada
    • https://static.usrfiles.com/ugd/5899d5_46f874ef0b924692b5bd2b5d75669fa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6fa92e436784cf9956ea7197c1b1fa1.pdf
    • https://static.usrfiles.com/ugd/b8c837_36d5bb7b602e4182b67b03335d90b34f.pdf
    • https://static.usrfiles.com/ugd/6c032c_5884193aecb448dfb45ed192d185f450.pdf
    • https://static.usrfiles.com/ugd/067ecb_a39b3408073e4d96a2431782aed4d309.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/atividades_para_educao_infantil_2_anos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/lepilimemanisudufexugize.pdf
    • https://cdn.shopify.com/s/files/1/0438/8660/8552/files/85837888299.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/98488665607.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/62117819028.pdf
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/70695308717.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/quality_assurance_tutorial_point.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_off00006fac.bin
814873dc950038bc79fe7961f4d46a71371f5e69227e01092a3a0b4723642696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAC 5620 bytes
font_01_sfnt_off000082f6.bin
3a5d29a5434108eb195409549a715a0569dc612907d88b095717d33a53975dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 10576 bytes

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