Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa863789c512c97a…

MALICIOUS

PDF

51.4 KB Created: 2020-10-05 10:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 39ada30fe8405f3be16e02a2028dd831 SHA-1: b1dcfb79eb2731cebe385b7743e839092456c0c4 SHA-256: aa863789c512c97a1e8d84bba7da11209e3f2eb55cb788d77b58ce5d96cd1d4a
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/strik?keyword=bangla+boi+pdf+link In PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/ninoxusiwibubi.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/32025562532.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/1/0481/5352/6434/files/43892523089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7832/3876/files/zurokinin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/86778188855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/oconee_county_schools_covid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/tamanhos_de_papel_sulfite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d0c196-f2e2-4f57-a400-084a217c6d39/buvegujixinununefasufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b7f35a-a8ea-469d-a319-09c43fba608e/5013012427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640ee324-5584-4818-8557-d2f3642eb321/vusaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77d8fc2-7edd-4688-b602-3338add0a02a/rejitozitulogaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79272cd4-de1c-443a-a782-42b05eb85b17/mekugajodofepaf.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7606 5188 bytes
SHA-256: cdae61d14540af13321a2e8ea271c3d290a949b25975cfbbdb69d3e4573e42a9
font_01_sfnt_off000087c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C2 6508 bytes
SHA-256: 0d25c4a0ae86bc3876b955271fa53a43568b124fa6a66d57a3aba572f009117d
font_02_sfnt_off00009d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D18 10292 bytes
SHA-256: 2f806327838c77ab64689c279828d49ffd2d2716b11bf3e5f977c55da70351ed

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