Malicious PDF — malware analysis report

Static analysis result for SHA-256 51609c7e8bb562d0…

MALICIOUS

PDF

78.8 KB Created: 2020-10-29 23:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b21cd5ba80a81021637fa7b6401100bb SHA-1: 97288a8e20963d3edf7634cfd2ad8d5c7540bf3e SHA-256: 51609c7e8bb562d0f240a231d14707abf29a6bef57703736ad127b67d82bb98d
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.com/123?keyword=white+precision+built+zigzag+sewing+machine+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f888840f4120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f88acf94dc5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_5f996e06dfdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f96e491864d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f90edd288aef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vipinib/zodukekuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/tigapujuwumazotitezozew.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/xitodosokedugowufidogivan.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/vevetilijewoseguwufiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8bff82-d85d-4cc2-8373-06eb621e953c/arkantos_mitologia_grega_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ba4d98-cca7-4d07-bbb8-4dbd2173984d/30019066940.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/41249097094.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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 5524 bytes
SHA-256: b41d806713afa7d733b09721dd9a768a1f16b03f698a4c511458ecacc422b45d
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 11372 bytes
SHA-256: 61d14509587924ccc0964985a567da9be161a33b8450c738813340511cf1acf5
font_02_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71