Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d8fe621707f32…

MALICIOUS

PDF

38.3 KB Created: 2020-11-01 22:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-07
MD5: c5b60a7df2cfe0cd8c7d851d40d26e67 SHA-1: d21f8ce00dbeaf63046c423094a22a6be10274ef SHA-256: 445d8fe621707f32b94bf61e37faa516544cccab0e529a8dbe1525a390211bec
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://ggtraff.ru/wb?keyword=words%20that%20start%20with%20twe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9e38594109e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f9b2d747ac0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f908d0a30dc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1951d7-eed2-4e80-b7f9-05634674f2e3/bagedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2877/7640/files/androdumpper_apk_for_android_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3068/4063/files/5475218317.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/dagaxemugamarizo.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/84514873639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4463/2257/files/21098310364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3498/2555/files/polyblend_caulk_color_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7882/1054/files/open_letter_to_my_husband_during_difficult_times.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/22353600382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acae6d4a-ffcd-4cb2-bfaa-49cd615d9600/jakinatufaferasoxesugikar.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_off000051e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E7 4988 bytes
SHA-256: ce89d141ae3f746ba859a946f76f00b9ccbad1f59d1c7752a0ca0cfe8949af85
font_01_sfnt_off000062e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 12356 bytes
SHA-256: e4b4e36d9b71472d10715a08fb1233ce2a89a7959ba784fcc2dc3258108a76b4