Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e331f00b81870f9…

MALICIOUS

PDF

49.1 KB Created: 2020-10-19 04:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 238d84364c5244effc729115a75abdfd SHA-1: 4fff318e0f2634e2c95abd3bee15f7168bb91961 SHA-256: 4e331f00b81870f9288752468b3511000e605399a43cb100cfc37c5cbdea8efc
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.cc/123?keyword=fragment+communication+using+viewmodel+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8aa0c2be7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86f46d25d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8c1f0f12538.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/sutonolob-taniwov.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/jilunego-funojijipew.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/1/0437/8797/6864/files/87848646893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8696/5672/files/vance_and_hines_fp3_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/51107788080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9926/6458/files/estado_de_derecho_en_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4045/1991/files/kodi_17.4_apk_for_android_4.4.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/manigaxilibexera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ef87f6-546b-496b-a310-ef1d0c8c49cb/pazow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de808ef-5f2e-443d-bc22-c07dbc224ac5/dozuzowalomuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9264/2465/files/826570918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/16099800768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6773/8786/files/45826129000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1058/3451/files/73014955550.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_off0000759b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 5368 bytes
SHA-256: cace95ed734d12197a93651e5da84ebab863bb0fad5517b9b40b7cf6bf2103cd
font_01_sfnt_off000087cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CD 15156 bytes
SHA-256: ed94106ec14aa5e17d6ada2f2f98c37a35b0d61006334a55fc03a5e581abed51

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