Malicious PDF — malware analysis report

Static analysis result for SHA-256 012aafafcfc26961…

MALICIOUS

PDF

57.3 KB Created: 2020-09-13 08:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b9f21242c72ac558e9674f491b1dcbe8 SHA-1: 56cd8018d9624f381f4584c8d71b9aaf0050e48f SHA-256: 012aafafcfc26961d3707e2ff40c4cfd627f7c90d4e0320069604c0d6b7bc858
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly indicate malicious intent.

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.me/wix?keyword=dihybrid+cross+worksheet+pdf+answers In PDF document text
    • http://files.beyondbodyclinic.com/uploads/1/3/1/3/131383456/dibakemetaw.pdfIn PDF document text
    • http://files.bluewrenadventures.com/uploads/1/3/1/4/131437701/4911640.pdfIn PDF document text
    • http://gakosuj.kevindeaneparker.com/uploads/1/3/1/3/131384281/22a5aff9a.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/1/0469/4615/6705/files/housefull_4_trailer_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2138/3333/files/23885031601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/solr_delete_all_documents.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f535ef80b684449da6f47851167064a5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e79a6_c8959d6265c24273b1a64903b8bb4408.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90d19e_24a461745a684b1ea98b76f4c4cf2368.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f0e51d_b0f5a8afcbee43b6a016920ced298b86.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b25e8_de584e65b56d4676bf79ab438aac9820.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_off00009679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9679 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off0000a073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 5608 bytes
SHA-256: 87694ae62221d82e0b2156a3fbb960cd6059bc39cb52fc3e1c1a82e403f48406
font_02_sfnt_off0000b396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB396 10140 bytes
SHA-256: c7622bf7c2ef2f3d7e40656c14dcea390086de6b3c3e7137700ffa84980408f6

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