Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fa2d99213444a0…

MALICIOUS

PDF

50.8 KB Created: 2020-11-09 13:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1d1f3dc372e2376a9cd401f4f693f0ae SHA-1: d4671844b87457e70d2c36e2942cdec531938e50 SHA-256: d4fa2d99213444a0a993ccee1da8ae67a018001f9be934e7bb1278b46ecdd542
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/123?keyword=essentisl+oils+for+bed+bugs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f91eedd6bfc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_5fa51548cf5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f9803a4e550d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_5fa79a2d7cda4.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/1114815.pdfIn PDF document text
    • https://xomowapiwaliv.weebly.com/uploads/1/3/4/0/134000086/vupafewuv-mojumasi-zojunuk.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/nazekisigiduz/bapodemakefarujedaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/86620046196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9621afb-04a2-4cec-abbc-34139be47365/25327234161.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/cisplatin_induced_nephrotoxicity_in_rats.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/komigoxutolajivoridowubuk.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/melodrama_examples_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/southeast_region_usa_natural_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/todulesakuximexexot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 4960 bytes
SHA-256: b3642922bbbbceabaadacb88f8a2063883a9743036e7b11d75109d7b09aca081
font_01_sfnt_off0000845b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845B 10500 bytes
SHA-256: 284d98811007338e39d367204f0d36b66d8d1ab8baf5d90495843e746b8c64eb
font_02_sfnt_off0000a828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA828 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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