Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0b627b336ba066…

MALICIOUS

PDF

46.4 KB Created: 2020-10-29 09:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 16209f2273637a0f46366465ca9fe053 SHA-1: d7e1dfcfe7c70765924ba26654f5e69da4cd34a8 SHA-256: ff0b627b336ba066a009390c1a5f5089627e59244f9347acbb60ff2cb79a68d5
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://ttraff.com/123?keyword=integrated+chinese+textbook+traditional+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5f995cc7ba084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f8c4255257ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8d00b8c14ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f8a122cd9900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f997a5535de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5f92048a56d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f8d3c206b805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8b205c02a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f990bf7cfe5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5f98e1b771298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5f9a1fb1cdbcf.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/fuwenoxuzasila/effects_of_pollution_on_humans.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/glencoe_algebra_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/fofudoxifotole.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/rulojizuzamonovanomuxepab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3695831-e152-41aa-8226-519cceeb4a09/52483285318.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/74883587137.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/50856865538.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_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5412 bytes
SHA-256: add1e2157fd0f1c38128b6c4b17228ceb22743b6441b01ffc5d7b8ec14a7bd63
font_01_sfnt_off00007ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 10144 bytes
SHA-256: 4fe2548e44867d37e43a25fc81f053310e144bbed37c886e93df70fc00986907
font_02_sfnt_off00009e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E64 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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