Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3d8ae227011844…

MALICIOUS

PDF

41.8 KB Created: 2020-11-06 02:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 313d9e34fb9f3e3899da0c0d75d624fb SHA-1: 20c2a2fc3cf7ee7f78bf537a5e4168e0e76ccb38 SHA-256: 9c3d8ae227011844e25055acdae5e59195d30a25708c9ae6cbd3671ecdbad6c0
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware download site. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Maytag bravos washer manual'. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/123?keyword=maytag+bravos+washer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fa29d9396d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f8effc948575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5f9f5c9288d5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f9988fedbef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fa06af1b6f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_5f95cb868cd64.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/0a3ef86d-0257-4eac-a91c-4d0a2a6d0d11/15812440444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0b866e-ac1e-47d9-a695-a74bb71132cc/75682741754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830f5609-d315-44cf-87dd-9fa548e36b87/wiguvuwepovigegulorakid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5140362e-1bb6-447a-a646-e42a202a74c2/price_of_pomeranian.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/60690913644.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/95912828226.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_off000064a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5496 bytes
SHA-256: 9c9ffec8508d77d52823b4ead21f2919e2e0bd3bbf63bcd4fba3473a0674673c
font_01_sfnt_off00007758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10212 bytes
SHA-256: 8c5e61b60ca7cee1637cfabbd5d99e0809da0d0ffeac44eff925f701b2673c6f