Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ccdab59361b839…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 20:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a550e05025dd6f5f4b6cee46ea00c101 SHA-1: 831e5b63468c699c69cfeec99585fc60f4212380 SHA-256: f3ccdab59361b839457bd1c82ee9278a57a184f8de2fc41a7bfd9dfb66db4516
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though partially corrupted, contains text related to 'sheet music' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to malicious infrastructure via embedded links.

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/pify?keyword=slumbering+weald+sheet+music
    • http://files.yoursosweetamericandi.co.uk/uploads/1/3/1/4/131453249/dc48207a8ed3a67.pdf
    • http://files.1boxonline.com/uploads/1/3/1/8/131857334/polojekijatazozo.pdf
    • http://fodug.krazykanvasbys-monika.com/uploads/1/3/1/4/131406893/manidatagadeno_polidelivefu_jusaxefer.pdf
    • http://viruba.thinkingbetter.org.uk/uploads/1/3/2/7/132712207/6641300.pdf
    • http://files.legendsdolive.com/uploads/1/3/2/6/132681482/4229791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/2295959431.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/20879406211.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/lukitinigafigedele.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/vidanod.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/sefiroziketomonuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/ti-_30x_iis_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/zalutumusuzivajufipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/porig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.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_off000056ac.bin
2f6bd07f4f0b5e63f948221b0a1796d17a66ef5525d9b8e60f75742e35601f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56AC 5688 bytes
font_01_sfnt_off000069de.bin
a007db6d0521f669d475c0e3695adcd27dd0d1d61aa25c911bf3b4a1664f7b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 14884 bytes

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