Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f35394dd5fc85b5…

MALICIOUS

PDF

44.9 KB Created: 2020-10-06 21:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-03
MD5: 6d925b9931e40ee1bc987095520f5e79 SHA-1: c9938ac49a6da670054965b7cff7fe0c78a58a91 SHA-256: 5f35394dd5fc85b57372a13949006d137baf93f1178218c3c861113c1692469a
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=atomic+structure+and+periodic+table+pdf In PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/vokasutinanajuniwal.pdfIn PDF document text
    • https://site-1038925.mozfiles.com/files/1038925/57096689629.pdfIn PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/dexalolos.pdfIn PDF document text
    • http://files.diamondpeaksalt.com/uploads/1/3/1/1/131163846/juxivawefisoje.pdfIn PDF document text
    • http://files.hajjmatka.com/uploads/1/3/0/7/130739472/6424785.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000063fd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000063fd.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009857.bin)
    • https://cdn.shopify.com/s/files/1/0486/3675/6136/files/forgotten_realms_adventures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1766/1347/files/49073883713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/7083082190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/enrique_iglesias_songs_mp3_free_download_do_you_know.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3299/2161/files/kisewoxewerenipitogilor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4451/2154/files/ds_happy_box_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/34939840957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/nickelodeon_alarm_clock_commercial.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_off000063fd.bin)

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 5312 bytes
SHA-256: 880d502202bfb1382dd8203a4f5d9176cd3941ae6299305bff4e807cc980d365
font_01_sfnt_off000075e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 10088 bytes
SHA-256: 9a83f0c7083951759ac534de73d45e29480aca6f4e346ddcb2e7ccb7b7c3d173
font_02_sfnt_off00009857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9857 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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