Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ff3b0f821f4ddb…

MALICIOUS

PDF

39.9 KB Created: 2020-11-03 12:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 608b6700ec9843ec8b19e4f2c63070f3 SHA-1: b8304297cf549fd96ebd834f183795022ec23c17 SHA-256: 33ff3b0f821f4ddb217a906401959aa244c016bc9da3648f8e2a1a90a3150d6c
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://ggtraff.ru/strik?keyword=neuqua+valley+high+school+volleyball In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f9d43e7e827c.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/wasina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5f9bb203abbb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f93000910329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_5f9c87025a6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8e83c45f845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8d52841ca0b.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/tifemuma/song_ids_roblox_pop.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/vw_502.00_oil_equivalent_sae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d887fb-5e11-4732-8067-fb987f9fb42e/mokisuwodosiwura.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/carillas_de_resina_indirectas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3bed16-e697-4fb3-946d-a4a1dd899a45/86342886311.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/92863449075.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/pozokibuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e113df98-8007-4b47-9444-60f5ee6ecdf1/8849487141.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000509f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x509F 5056 bytes
SHA-256: 0b3519d4c113ade62f878bde39b3e0dd60003be968513fdaae3dd638e75969d7
font_01_sfnt_off000061e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 10200 bytes
SHA-256: b9b17151a654ad48687be50bbdc739a9df460cfaef49bdee04dd1e89b18a98e6
font_02_sfnt_off000084d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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