Malicious PDF — malware analysis report

Static analysis result for SHA-256 964dff8c7721a537…

MALICIOUS

PDF

43.0 KB Created: 2020-09-22 08:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0263c3269bf627076b73707f355816aa SHA-1: f87327c5241d7d1b87f89404113ea26e63930a90 SHA-256: 964dff8c7721a5372fee8eef4ca5804e639180035bfaeb2a7508b10a33d4ef18
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM firings indicate these links are intended to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern is the mass distribution of potentially harmful URLs.

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.me/wix?keyword=small+is+beautiful+pdf+francais
    • http://zevimega.palestine-shirts.com/uploads/1/3/0/8/130814337/xipojunanewinoze.pdf
    • http://zavolop.nicolaseconomou.net/uploads/1/3/0/9/130969341/zadofefomevudeg.pdf
    • http://fabunej.bahaisofcarrollton.org/uploads/1/3/1/4/131408100/xatijifekizilevimoja.pdf
    • http://files.debistrong4peacehopelove.com/uploads/1/3/1/1/131163666/farivusijik_wiwofimud_petabatu.pdf
    • http://vekak.conditionorangepreparedness.com/uploads/1/3/1/6/131637372/gijuradajesisolulune.pdf
    • http://nawek.forthillgospelhall.com/uploads/1/3/1/4/131407299/faxojefokigiko.pdf
    • http://kizuf.tracygreenhalgh.com/uploads/1/3/1/3/131384081/7462722.pdf
    • http://files.conoverghosts.com/uploads/1/3/1/4/131438500/225711.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/luniz_i_got_5_on_it.pdf
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/3d_printer_supported_file_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/38667186893.pdf
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/brief_medical_history_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/chicco_liteway_plus_manual.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_off00006a21.bin
de0bec18d35ad0cc2e39722d9426020e68420e073197e63e2d8393fadba2a5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5544 bytes
font_01_sfnt_off00007cd6.bin
9c16173ade790f6b0250d33e37064e6d0857a9cacc8d461ea04f6beea7fff33e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD6 10140 bytes

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