Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38fa1f48eaa4f43…

MALICIOUS

PDF

67.5 KB Created: 2020-10-30 04:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 685b17108254c78c077ec2053832875d SHA-1: 11ee42c81cbddfbacd67fd181e38282451eb1d41 SHA-256: f38fa1f48eaa4f435b01becf7e819beed1f0ad0d4ff4dc87681017c4e0e7b58a
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://ttraff.com/123?keyword=summon+greater+demon+5e+list`. The presence of a "Summon greater demon 5e list" in the document body, combined with the malicious redirector, suggests a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/123?keyword=summon+greater+demon+5e+list
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f8bf15084d35.pdf
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f8966e7382d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0486/2427/1525/files/12267061206.pdf
    • https://s3.amazonaws.com/rexogeguxosix/lajomazuniloz.pdf
    • https://s3.amazonaws.com/sixenogafopoj/berliner_platz_4_neu_wortschatz.pdf
    • https://s3.amazonaws.com/vavale/dark_knight_armor.pdf
    • https://s3.amazonaws.com/wunupalezozerud/renawivunituzenatelut.pdf
    • https://cdn.shopify.com/s/files/1/0496/4204/5591/files/lugols_iodine_solution_5_percent_dosage.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f4.bin
49161a50328e11a5c4b472901b2682d74ce662470886b5ef46f61b775eaa4b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F4 5372 bytes
font_01_sfnt_off0000db20.bin
75a029db78e8d1516182382ba61b8e5370d1d41fcd5c3b84f3ce00d910fcc9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 11356 bytes

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