Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbebd8ebaca2374…

MALICIOUS

PDF

46.1 KB Created: 2020-10-25 09:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54c3d45b3ba516942fcfeae1148c658 SHA-1: 9e40981e851e28424b46500041bc0d6fa017560d SHA-256: 8bbebd8ebaca2374b43bea871861a94d9298e784a7e6c811056e1e8ed646e9fc
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.club/123?keyword=nemat%25C3%25B3ides+caracteristicas+gerais+pdf', is the primary indicator of malicious intent. The document body, though heavily obfuscated, appears to contain this URL, suggesting a phishing or redirection attempt.

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.
  • 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.club/123?keyword=nemat%25C3%25B3ides+caracteristicas+gerais+pdf
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/8d4c1a2.pdf
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/9755103.pdf
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/21fea235a1a81.pdf
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8e2566b33d8.pdf
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f8bdc113ef00.pdf
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f92506509986.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/kapagenutodixukaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2597/files/ramcharitmanas_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0500/2733/1734/files/the_bonehunters.pdf
    • https://cdn.shopify.com/s/files/1/0479/1671/2100/files/how_to_play_friends_trivia_card_game.pdf
    • https://s3.amazonaws.com/zuwimadaneb/votexe.pdf
    • https://s3.amazonaws.com/tesodagiwor/vokofajunujoleboveduvik.pdf
    • https://uploads.strikinglycdn.com/files/2320da24-8a03-4be8-943e-116468144eed/2684730369.pdf
    • https://uploads.strikinglycdn.com/files/c862a2f7-6f6e-434a-b0d6-6432b1776db3/bitinovo.pdf
    • https://uploads.strikinglycdn.com/files/d0ac03f3-195b-432c-953d-dc5795846c64/20076518717.pdf
    • https://uploads.strikinglycdn.com/files/73564e10-dcfc-453b-8ad8-f80209f8287f/live_gaming_on_windows_failed_to_ini.pdf
    • https://s3.amazonaws.com/taturi/rigozedifufegapewa.pdf
    • https://s3.amazonaws.com/kavitokolezub/shobde_shobde_al_quran_download.pdf
    • https://s3.amazonaws.com/numegubowalonan/philadelphia_transit_map.pdf
    • https://s3.amazonaws.com/tiduro/above_the_line_urban_meyer.pdf
    • https://s3.amazonaws.com/towakog/carb_free_diet_plan.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_off0000716d.bin
f7ebf72bd4762bd69ffdaa36b5c3c5a1b0b9412276543a5f776fb336d2381a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 5548 bytes
font_01_sfnt_off00008401.bin
58c9e2593e39a7ff7ccb160f3ccd559cd199ecaa43103b213b0f6cd6cfeee77d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 12100 bytes

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