Malicious PDF — malware analysis report

Static analysis result for SHA-256 478c50ff3bc4def5…

MALICIOUS

PDF

47.6 KB Created: 2020-11-01 14:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 57bd36dfa58cefbcd0047955ceb7147c SHA-1: 07a4c57e86e61e16207d4339e93c6b72b7f0aa3d SHA-256: 478c50ff3bc4def5216048173cc729fb161ce0c01762768740ee942ebeb11131
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://cctraff.ru/wb?keyword=diffusion%20and%20osmosis%20crossword%20answer%20key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f96d9c8912bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f943c952f788.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/7349712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8730c472727.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/zutakeloluzulusevosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f9bc05f7ade8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f88c33f6ded3.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/255749d778c8.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/1/0437/4816/3735/files/mobile_phone_repair_manual_free_download_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9445/1387/files/wiccan_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2c2ffc-4aa1-440e-8686-b62cf7bc3fda/kabofibubigaxupet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/3d_love_wallpaper_download_for_android_mobile.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008963.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8963 23236 bytes
SHA-256: d46710b64cc39b0881022ac4ad571e0846143b8acfe74d8c17de2ee28b282514
font_00_sfnt_off000056c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C8 5392 bytes
SHA-256: 8eafe5a4e3c0ff3a0a279830c6bf506c8fa7bde1502f8f98e0e1b094fba58ea6
font_01_sfnt_off0000692e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692E 9376 bytes
SHA-256: 48cd1a92566aa431d426acd30fa16280052275c28f597582edb36fd93a2672b6

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