Malicious PDF — malware analysis report

Static analysis result for SHA-256 87597960bf93a06d…

MALICIOUS

PDF

42.8 KB Created: 2020-10-06 10:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-04
MD5: 153663cdb01f24bbf755b2f4db877e24 SHA-1: 26380074d81d6713e521816acdea67272c2d5ba5 SHA-256: 87597960bf93a06d4dde9f325490c24d14604a117ddcbc0e96e08965fbd7f2e7
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=vsdc+video+editor+manual+pdf In PDF document text
    • http://files.openairfarm.com/uploads/1/3/0/7/130740374/5e868a6f.pdfIn PDF document text
    • http://xivore.thepatternstudio.com/uploads/1/3/1/4/131407406/gexaxurebekapixul.pdfIn PDF document text
    • http://files.channelcenter9.com/uploads/1/3/0/7/130739769/2654603.pdfIn PDF document text
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdfIn PDF document text
    • http://files.lovettpianoworks.com/uploads/1/3/0/7/130739918/jewajopaginim-garajum.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005cb1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005cb1.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009093.bin)
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/81584245638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/lajogubelafowej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7424/8097/files/66400021005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18627086-f179-466f-9f4c-db3434e058b3/43352306621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/chuyen_vui_doi_linh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/left_4_dead_2_free_mobile_apk_ios_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2230/6461/files/51846412807.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_off00005cb1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 5208 bytes
SHA-256: bf2c0e592574bebe088777af10c089165277e57049ef8f23e54b36127a5834f6
font_01_sfnt_off00006e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 10116 bytes
SHA-256: eef229aa2542964175df0873e406401f3709b2db478a3ae0f5aa8f8a3094fbe7
font_02_sfnt_off00009093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3