Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3efbc540fa41dbf…

MALICIOUS

PDF

44.4 KB Created: 2020-10-15 07:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 12f7d9ae28787309824c56f51cd1e5fe SHA-1: a664025aead03aa231af8c5d0f8ae435322b1c7a SHA-256: d3efbc540fa41dbf9912ffd41766e1783fce1386c041e2459c06578fc8c022c6
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/pify?keyword=routledge+encyclopedia+of+philosophy+pdf In PDF document text
    • https://site-1044300.mozfiles.com/files/1044300/67279414079.pdfIn PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/8192638014.pdfIn PDF document text
    • https://site-1043536.mozfiles.com/files/1043536/88873351704.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/44609920011.pdfIn PDF document text
    • https://site-1042014.mozfiles.com/files/1042014/71393793127.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/83021431914.pdfIn PDF document text
    • https://site-1039727.mozfiles.com/files/1039727/nazedajow.pdfIn PDF document text
    • https://site-1039173.mozfiles.com/files/1039173/dekiv.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/1/0497/9474/4482/files/the_art_of_hearthstone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9598/4795/files/scrabble_game_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3496/8742/files/57531485095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/tokunivemopupupatuzep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5207/5681/files/feeding_bees_fondant_in_spring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/forged_by_fire_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4204/6630/files/gibbed_borderlands_3_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4364/7399/files/vujap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9949/6871/files/95873743940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4635/3096/files/suxonadaroreb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7297/3728/files/mofidopoxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0079/3768/files/los_paises_mas_importantes_del_mundo.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_off0000675f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675F 5432 bytes
SHA-256: 3ab7c94c21afa6a648e0d3f40e7b7893d6df22c0153db94d099729c109902b80
font_01_sfnt_off000079ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EC 13476 bytes
SHA-256: 1a0d0d2c3afd5bbd0080b335b67a0cc489cd82c07c756242e33976eb829cc536

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