Malicious PDF — malware analysis report

Static analysis result for SHA-256 344e0bb19e10d5e5…

MALICIOUS

PDF

46.0 KB Created: 2020-09-04 12:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a45fd0096239b8f9ea1b62b67dc67f SHA-1: d41d09fcec34fbd97ccf6fb70f8a805808989dd4 SHA-256: 344e0bb19e10d5e52f630ede79c7fdc463dc20df5aba5916db171d55e72b2354
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'free excel project dashboard templates', aligning with the SE_INVOICE_LURE heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=free+excel+project+dashboard+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_c5770c939a3345329611b70808e26100.pdf
    • https://static.usrfiles.com/ugd/078c79_52fd06d75c314d888998153f191806a2.pdf
    • https://static.usrfiles.com/ugd/bfbc46_1eeab2f0f7f94fb48fff81cc548ec64d.pdf
    • https://cdn.shopify.com/s/files/1/0454/0373/4184/files/activismo_poltico.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/rojuzisumasorex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/banking_service_chronicle.pdf
    • https://cdn.shopify.com/s/files/1/0463/7337/2059/files/47152391120.pdf
    • https://static.usrfiles.com/ugd/debdc1_290d9dca95bb4a339d60f0d804f93530.pdf
    • https://static.usrfiles.com/ugd/fb5067_63614fa274be4acbb6082f42bbadeb9d.pdf
    • https://static.usrfiles.com/ugd/93c935_3c2e2af98b20435c9a90855bfd781752.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/australia_rail_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/8204/5858/files/cv_europass_template_2019.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006844.bin
cf4dc86fd8f4c9fc1fa38356d8d32f410ea54ab603face421533ac7c9340133c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5188 bytes
font_01_sfnt_off000079ec.bin
2a7ff1b46668ea067471c41b3460f525f7e9daffb00fa63ac923a338e06d94b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EC 10380 bytes
font_02_sfnt_off00009d54.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 4324 bytes

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