Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb5db3d17b3d4bb…

MALICIOUS

PDF

37.7 KB Created: 2020-10-31 23:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a717647fc8b7635f228ae2b65a8f997a SHA-1: c1c852f2a095b50c799211eb1b81ef5036bfaeda SHA-256: 3eb5db3d17b3d4bb8c3e949c6028d10a7f15e603f9723cbdd640f547d959ab34
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure to install a browser extension or update, directing users to a malicious redirector at 'https://ttraff.club/123?keyword=unit+2+chapter+2+ap+government'. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.club/123?keyword=unit+2+chapter+2+ap+government In PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/rikixisofo.pdfIn PDF document text
    • https://kijatuvoriwoze.weebly.com/uploads/1/3/4/3/134352029/fibopikawilux_bupugewofemusub_tinor_kuzewenogow.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/jobeg.pdfIn PDF document text
    • https://lenimupet.weebly.com/uploads/1/3/4/0/134013040/4f719bce61.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/xifiziwofidok_raxubef_vipigo.pdfIn PDF document text
    • https://tafajasezo.weebly.com/uploads/1/3/4/3/134312542/5767109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/wukaxaparefesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8645/0328/files/hampton_elementary_school_milwaukee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf9bac-659d-4b2e-ac32-9875c81b345e/xxxtentacion_17_rar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4351/8121/files/vagedanapunoxige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/kawafurafidigekuded.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/file_explorer_ex_android_2020_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/49772194861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0718bf25-7c05-4181-b7bd-7076c2cd4a38/tufufiminuxavamaxonabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f4ee86-7bde-44f3-8151-53a36d7d12bd/11194648854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/ave_maria_lyrics_latin.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_off0000520c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x520C 5320 bytes
SHA-256: 2fc9dc16356f779fe87722339642ee0b84891d9e506ca2d0cd1bf738a77b6c60
font_01_sfnt_off00006408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 11092 bytes
SHA-256: 98bbf9fd509e46b7a8a463c02877e489d9fc6a007f291aa71ac0ecaf48dfa694

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