Malicious PDF — malware analysis report

Static analysis result for SHA-256 9188565335773bec…

MALICIOUS

PDF

40.3 KB Created: 2020-10-12 14:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d2451f8bd25c257f247cb28b5dc30c51 SHA-1: d2f45869616c4abfadd29ab84183dd43e74750d0 SHA-256: 9188565335773bec881ac83e47ab1b777c0f4b9e0dadd3b1c92941546e513306
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that attempt to trick the user into clicking a URL disguised as a download for 'tube mate para celular android'. The primary malicious URL, https://cctraff.ru/strik?keyword=baixar+tube+mate+para+celular+android, is flagged as a malicious redirector. The document's structure and content suggest it's part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=baixar+tube+mate+para+celular+android In PDF document text
    • http://lefek.aspenridgeslavelake.com/uploads/1/3/1/3/131384098/4efbd0e93b4ccc.pdfIn PDF document text
    • http://files.bishopsstortfordjudo.com/uploads/1/3/1/6/131608016/vogeletuxu.pdfIn PDF document text
    • http://files.cittieoflondonbrigade.org/uploads/1/3/1/4/131454093/muxigidava-xokodoj.pdfIn PDF document text
    • http://files.masterpieceonlineacademy.com/uploads/1/3/1/8/131872185/petuwirunugezifaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3662/5064/files/19508985378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7720/0793/files/response_to_stimuli_definition_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0825/6923/files/spiritual_goal_planning_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/britain_changes_its_colonial_policies_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7233/5255/files/bovekemezadezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/las_grutas_de_tolantongo_resort_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0086/7234/files/85338946527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/naruto_shippuden_ultimate_ninja_impact_save_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/audacity_software_for_android_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/komm_gib_mir_deine_hand_roblox_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7066/7931/files/6216099724.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_off00006077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6077 5296 bytes
SHA-256: 5c4f5af2043e20bc46fa044645d531f01764bbb6d63cf76c6c33a219840dc4da
font_01_sfnt_off0000725f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 10016 bytes
SHA-256: 5b597c3d480acab8f687f666ef0bf92c7f728a33e6d776f77a3c03d10936d28e

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