Malicious PDF — malware analysis report

Static analysis result for SHA-256 258772b550a98f6f…

MALICIOUS

PDF

40.7 KB Created: 2020-10-04 09:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-12
MD5: f27a9255401abb3acfeae5907d85bc96 SHA-1: a4e0c7db9c240d71420e0ae3014d649731f7273c SHA-256: 258772b550a98f6fe112cb3c6b20ebf62455e282313bdbfcaf90f96bc82c4e9b
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=samsung+s9+plus+camera+apk In PDF document text
    • http://rujapi.fresnohighcheer.com/uploads/1/3/0/8/130874488/kavafekuzopi_pomatokogenebu_rasupaxamo.pdfIn PDF document text
    • http://files.sfcareteam.com/uploads/1/3/0/7/130739480/bofufelefovizu.pdfIn PDF document text
    • http://files.injectiondepot.ca/uploads/1/3/2/6/132681949/vabodojuto.pdfIn PDF document text
    • http://linuw.coonafit.com/uploads/1/3/0/7/130775830/5421089.pdfIn PDF document text
    • http://files.melspilatesshop.com/uploads/1/3/1/8/131856646/bamuv.pdfIn PDF document text
    • http://files.johnmillselectric.com/uploads/1/3/0/8/130874189/e3e53cc49.pdfIn PDF document text
    • http://pimux.utpfoundation.com/uploads/1/3/1/3/131380429/vorava_sidojila_rosifudokiwuw_verizomavavito.pdfIn PDF document text
    • http://files.allgreatsignsfla.com/uploads/1/3/0/8/130873807/zawefuparugorip-xakabi-tulurus.pdfIn PDF document text
    • http://files.comalcountybar.com/uploads/1/3/1/3/131398100/mudebugelesepaxo.pdfIn PDF document text
    • http://files.lakefieldbaptistchurch.org/uploads/1/3/1/3/131380031/jidisebazux.pdfIn PDF document text
    • http://files.resurrectionpeople.com/uploads/1/3/1/4/131483009/dulanag.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005fbf.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005fbf.bin)
    • https://cdn.shopify.com/s/files/1/0480/9290/5636/files/motor_electrico_para_porton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1904/2457/files/oklahoma_voter_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/sundiata_an_epic_of_old_mali_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/6076596627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5621/8780/files/30302922375.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_off00005fbf.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBF 5576 bytes
SHA-256: e71931621a594bff5b633b056ca251d73a685f2dc53caa4882b193b872efabf5
font_01_sfnt_off0000729b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 10256 bytes
SHA-256: 7dc60f84e25e4d16ade65be59c4f12add153ec26c11b0f6d667191c7cc04e657