Malicious PDF — malware analysis report

Static analysis result for SHA-256 4781a5d4ed5d6db0…

MALICIOUS

PDF

54.4 KB Created: 2020-09-30 12:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 9ab205d3978ae8e3e18f77798bec98d5 SHA-1: 9f28941b20b4d92a32e929750ee942c393988f85 SHA-256: 4781a5d4ed5d6db0586edb4e548f73467b5080d247c2ac33d8048fa01144c89e
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=discuss+the+adlerian+therapy+theory+pdf In 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/1/0481/2606/6851/files/introduccion_critica_al_nuevo_testamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/canteeni_mandeer_mh1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6198/8507/files/texunuluvomovam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4701/3530/files/jumanji_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/persona_5_beef_bowl_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/black_swan_green_hangman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/hulu_live_tv_guide_tips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/paulk_funeral_home_obituaries_fitzgerald_georgia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/sia_cheap_thrills_mp3_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/duziwapam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6947/3696/files/wuziwexetukimupilugipul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5832/1818/files/49977730718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/sefepekunenijofonovoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/perspectives_on_the_world_christian.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_off000096c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C6 5344 bytes
SHA-256: 75e0a235b306d887338c1c9f353d3296d2f92ebb30e3d21e486d4328343c5d1b
font_01_sfnt_off0000a900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA900 10312 bytes
SHA-256: f07503897d78fdccf0b7d608c872931e099ce45308a6322f2bae0afb38308d89

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