Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bcf5d8705a4356…

MALICIOUS

PDF

43.9 KB Created: 2020-10-29 17:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 17845b69ffd311e4a74c2559329ef605 SHA-1: 794874b37832b096e40ea11a97ba58ece4b9c6ae SHA-256: 72bcf5d8705a43562a9b6eb676cd21f32618e8fd35d7f98055ce156bbc86e5e3
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/123?keyword=final+fantasy+7+remake+art+book+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a likely phishing or malware delivery 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.cc/123?keyword=final+fantasy+7+remake+art+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f8b1fcbeaf0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8a9710e8990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f890f5704a42.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/1/0435/6577/7059/files/mufisazifutogibizako.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/scanned_to_word_ocr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3ceb5b-ebcc-4c25-966d-546234f02b67/videopad_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/boylestad_12th_edition_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/myoma_in_pregnancy_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28d9eb8-bccc-4594-8c9f-b690aced043a/vebibusavajorus.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/third_conditional_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2632/0040/files/gozutirupiwivo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/fewutepirugawakudute.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/9769606694.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/examen_ser_bachiller_enero_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC6 3580 bytes
SHA-256: 99513f359bfed863b700e2c2447ccc7c39f40330be2f9e54fa510fcfb95a35e8
font_01_sfnt_off00006b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 5528 bytes
SHA-256: f29b95df8bdc7cc0c3d8e4d87f80f188b8d9750ae23e4464d2b00ddcbd2569b5
font_02_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 10524 bytes
SHA-256: 0d179087c9b4cce25ad3dc3e05cf6cc32c299e81ce381745ec84d10ec184e19c

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