Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddd09448dd86873…

MALICIOUS

PDF

34.6 KB Created: 2020-11-08 06:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3669f6f91e5a8b66b92715c22eaba32 SHA-1: 4b2e53362e637be5305df9ef6dc5372fc131286f SHA-256: 7ddd09448dd86873c629341da6461ec502b01cc1d9078da22cf4b4a07475f8e0
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, aiming to lure the user to a potentially harmful site.

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=post+course+assessment+transit+everfi+answers In PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/3854922.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/toxerivaled-suwakege-mofej-xetemuxaf.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/2880003.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/lumekep_nafinujod.pdfIn PDF document text
    • https://wopusuxosar.weebly.com/uploads/1/3/4/5/134583764/9473432.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/4a0d12b273.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/saziwijaxodav/53327850050.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/boxoxixusakinomov.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/23219847668.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bergamot_doterra.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/apk_pandora_premium_download_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/67980755138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd900af-8138-4f24-a7a2-a4ff7eb61e48/fubelirewewazegagujamex.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/terms_due_upon_receipt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d632777-76e1-4340-8654-aa78ef909e42/92500785891.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_off00004a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A39 5148 bytes
SHA-256: cf683c015b0bf011cd9ef06aecb56af9685199cc08e331775f60fd9207daaf60
font_01_sfnt_off00005bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBB 9768 bytes
SHA-256: e501768cde19b6d64f8c781c1b9946f341cb78cfa565cf755f0cc2d1c2616c53