Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3b33c21faacf14…

MALICIOUS

PDF

48.0 KB Created: 2020-10-26 10:21:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6710db821dca9bc0883415259b621b10 SHA-1: dacb5b509cdd73fdb2ac718d51ce0128d2a8fd13 SHA-256: 9d3b33c21faacf14fbe283b5fb39b0d4e4bec62bd1bbdc0615cc22e2b06bce91
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/123?keyword=balls+of+steel+pinball+android` is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing the phishing or malware distribution vector.

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://cctraff.ru/123?keyword=balls+of+steel+pinball+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f9680c2bced6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f9651f3577dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5f94300c6c98d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f88a3c8a0fb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f912ff8ac61e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5f8f00c206fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f8dfdd5e97e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f8e2c9761283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f93c510bfe95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f8e973c0fcf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8c6231b2e81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d3fc75-ac99-4b27-892a-30b39b183d2f/14169642055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f73dd8-4efe-4b5e-89be-645cc5aa5aac/5886949874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bbbed3d-081b-4d1a-ad33-b0bc1d20a4b7/sovan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4c2aa6-11b2-4e11-8cc7-eead59eb78c9/black_desert_online_character_creator_download_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed88d8e-a625-4dbb-a56d-4f3c831187d1/53974174692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c8c766-86a7-45ca-8ff2-495a69216b9d/mofurezorofulejop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073ae48e-3b35-433c-aef2-b75ccbcbb18c/3755770401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c84764-6ea4-47c4-ac72-44cbad5e8174/dusugazisomaxedomolagufak.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/achievement_motivation_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/81682027418.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/namakam_chamakam_download_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/xaburin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 5224 bytes
SHA-256: 2446b60b2209f86fadd722aee5d5520c5c501fdb091579c695dd0074ba18c11c
font_01_sfnt_off00008cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC3 11128 bytes
SHA-256: f412ead4003e55efc8fabdd54388dc049ea658323b3e5c3534c0333fbef97ee7

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