Malicious PDF — malware analysis report

Static analysis result for SHA-256 425257c6872deb28…

MALICIOUS

PDF

41.7 KB Created: 2020-10-24 08:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 22c0218547d83ec4eb7f1cfa8a7fef8f SHA-1: 8735cbb8b290fc70cac8f6b867b5e3d4e06abe5b SHA-256: 425257c6872deb287adf23a52827604285767b21a9d7190d2df49abd7dc9023e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/wb?keyword=ecuacion%20cuadratica%20ejercicios%20resueltos%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f877201db9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5f92c7c23e271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5f927d51280d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f899479c4ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8821429e4a7.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/wamejotijalitaf-zobemirutoripof-jedubovoxewufa.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/1820268.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/1/0433/8827/2805/files/johnson_acoustic_and_auditory_phonetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/what_is_dopey_drug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0345/1813/files/tomapowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7403/8176/files/serpents_bluff_ruins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8422/9029/files/81969985291.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/78524050585.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/all_bengali_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/calculus_textbook_larson_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2772/5995/files/netflix_app_download_for_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1672/8988/files/existential_therapy_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/werupuwil.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/bangla_book_free_download_masud_rana.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/kptcl_junior_assistant_syllabus_2019_download.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_off000060b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 5180 bytes
SHA-256: 4630123f68a96cdf7114c0e0cfe15651c16a55db04365422d35424069ad4415d
font_01_sfnt_off0000726f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 11436 bytes
SHA-256: 11d8643f5d2ad624f59c43f145b31b09299fa486c3ae4b1757f5e02718763445

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