Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1559734a65027f6…

MALICIOUS

PDF

80.4 KB Created: 2020-11-01 19:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 673b9a3fea7f9c0d0c5ffc537dce7ba1 SHA-1: e2b9174487ca20296ebef2f8211ff5183c2568ad SHA-256: d1559734a65027f65c7b8b3887a303fd4b26f0fa294b2fb8af89ec55e718fbfc
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely intended to lead the user to a malicious site. The embedded content, though heavily obfuscated, appears to contain the malicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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://ggtraff.ru/aws?keyword=high+school+dxd+season+2+episode+13 In PDF document text
    • https://nopubekekav.weebly.com/uploads/1/3/4/5/134511336/govixenaviwulej.pdfIn PDF document text
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/jigif_laxovivigimiki.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/8762396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f902f9dbac71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f875ae6ad605.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/8aa7a241-690c-4718-befa-3da31a8471f4/cnet_security_cameras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/the_eternal_flame_buffalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47399331-2176-450f-b0fd-6f576ebc1593/foxijagijekope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1746/9604/files/pebunig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c559bc69-ca0a-499a-b8a0-10af4336d05f/33034465280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e48462-978c-43f7-b693-91caab567f4c/25862296458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7644/4865/files/crossing_the_river_with_dogs_problem_solving_for_college_students_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a272416-bcc1-4250-9411-2e0d18cac824/tatef.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
stream_004_off00009073.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9073 31008 bytes
SHA-256: d9430f168355c308c07397e7c372e7db351dd405b481a395cd42813491bb0dbf
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5616 bytes
SHA-256: 21d82f8f43c9ba090c22bffa48bc868be1c6d906a7273a93203f8fab7555aa8a
font_02_sfnt_off00010449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 15492 bytes
SHA-256: 41fc1ce45c12bfe7a2922f83d2f1136f0221905d325f073919f973f12738282e

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