Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d662bc7bb769f2…

MALICIOUS

PDF

41.6 KB Created: 2020-10-29 05:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f58f2d13769d465c06ee20c6b66595b4 SHA-1: 95ef7a2c05f8ebf269c6a5a9157061bb658f3277 SHA-256: 50d662bc7bb769f26519d99ada7e030ae45bbace8f93174637db61e155b8d556
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure, indicating a link farm or phishing attempt. The primary malicious URL identified is https://ttraff.club/123?keyword=school+bus+driver+poem, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure to encourage clicks. No scripts were extracted, but the presence of numerous external links suggests a redirection-based attack.

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://ttraff.club/123?keyword=school+bus+driver+poem In PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/vitelipaxora_lupowevarokiwel_kinimokuda.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/3975362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jikopot/vietnamese_pickled_carrots_and_cucumber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f641b8-60da-4eb9-85a8-8893b6cb4bd8/46166325696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/67132243890.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/neduxovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/puppet_pals_2_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/goal_the_dream_begins_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5086/8121/files/fedegejuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2644/3171/files/47763417742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210349fb-3069-4764-9971-ea39d5b54ebf/ccna_2_chapter_8_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/ancova_spss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/technic_launcher_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0822/7485/files/45811941162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be06b505-c72b-4299-a94c-cc6864312c04/palmeras_en_la_nieve_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00507fba-9a3f-4bce-8cf6-aad8a2ca986d/buzarakijodapomafuxuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/aprenda_a_manejar_florida_bebidas.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/jonepasivakanuzoxuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282774b6-22e2-4a9d-b265-8e20c7f7e27a/mowuwaputuzawuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706f57df-6dff-4f07-96ca-059281bd57dd/sobominorugilumege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5f8862-667b-43ca-9220-d91ec760a61e/dotuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/72734581249.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_off00006360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 5408 bytes
SHA-256: c50b35d6eac89fbf672db00dc6ee67967a35dcc7eaa9b70a0978a7738044cc61
font_01_sfnt_off00007599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 10456 bytes
SHA-256: d4d7f8860f436bd6d777b4a145cdd3bf43af0e4ef9f25a541494ba0c1c2319fb

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