Malicious PDF — malware analysis report

Static analysis result for SHA-256 974c888a2cfd3ee2…

MALICIOUS

PDF

58.2 KB Created: 2020-10-18 00:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db71a5ca033ab7f1a122e9c6db7c527d SHA-1: 9e57551a11ed8e804d399d2f69537a53d402612a SHA-256: 974c888a2cfd3ee2f48e572427bb191cbc163cedb81852045c3e5597a11495d8
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=el+positivismo+juridico+bobbio+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8b5c4d7fa88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8a63450564e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8868bed13fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f873b1f36a8b.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/5639183.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/wosezobibewuvikaxi.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/1042221.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/3722862.pdfIn PDF document text
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/ed6a6e98b.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.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/1/0497/7111/8746/files/miele_cat_and_dog_hoover_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0851/4974/files/ganuzelunututixiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3206/3383/files/serunamexerudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0386/9846/files/lip_tattoo_ideas_on_neck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0229/2118/files/44658949637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/zajovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8542/5557/files/19545111892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8493/7900/files/danitemari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0996/4735/files/download_no_gba_emulator_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/jedi_and_their_fighting_styles.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_off00009b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B50 5324 bytes
SHA-256: 7eede71511afcbeef940dcfcee445ede08ae416973ff4aa4526c5ff116c0b1ad
font_01_sfnt_off0000ad5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5B 14552 bytes
SHA-256: cce10166d8e28bae1d8e1f8dfd83fde74e299e8544d97789c3ffbb24a68ac1fc

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