Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ffdc71e518b895…

MALICIOUS

PDF

31.2 KB Created: 2020-10-13 06:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-08
MD5: 4bd3bdb3f25faafa7724d3580086554a SHA-1: 115d207092d2a122d7212db57876fe809e34ed39 SHA-256: 98ffdc71e518b895d5f9a839bf16e01f26fd57784367b687638e9f1d1bc1fe49
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://gettraff.ru/strik?keyword=somewhere+in+my+memory+pdf+choir In PDF document text
    • http://larul.thelowvisionstore.org/uploads/1/3/2/7/132710657/5a366479.pdfIn PDF document text
    • http://files.beiermanchem.com/uploads/1/3/1/3/131398296/5a90d370.pdfIn PDF document text
    • http://files.amandatriplett.com/uploads/1/3/2/6/132695915/7030463.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00003df0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00003df0.bin)
    • https://cdn.shopify.com/s/files/1/0435/2403/0618/files/sms_error_cause_code_65535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/introduction_to_management_accounting_16th_edition_solutions_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e229e41-ab2c-4b47-a85c-7947662d1fb3/73260934694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8225c3-b3d2-479f-b312-5ad5e1867061/33832917203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/how_to_make_fried_ramen_noodles_in_the_microwave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3752/4636/files/25309846681.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 extracted file (font_00_sfnt_off00003df0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DF0 5272 bytes
SHA-256: 0e9fa252ea81b10332df147fc62b1566d054caa38ba83581aef3b476bd2ce34a
font_01_sfnt_off00004fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCD 9572 bytes
SHA-256: e0d860196b44a3400e7081ddf2c04325cc7a04a2affe22859a562e22d2d7d888