Malicious PDF — malware analysis report

Static analysis result for SHA-256 550bad407f85360f…

MALICIOUS

PDF

50.5 KB Created: 2020-10-30 17:21:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-04
MD5: 0c7dd0f782fe872937167f2e0cbb0cf3 SHA-1: ae35f2744d802dff3df9f87ee87c3815bdd9ca4e SHA-256: 550bad407f85360fddc4caefbc9634d909cf1e7d51359ee15203ec414f56b7a5
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/123?keyword=volume+trophy+guide In PDF document text
    • https://s3.amazonaws.com/subud/java_basics_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/rekegadowositewed.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/2022458.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/16678474953.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/fifa_20_coin_generator_no_human_verification_or_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/calendario_bundesliga_2018_19.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off000084f8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off000084f8.bin)
    • https://cdn.shopify.com/s/files/1/0268/8594/7561/files/conjugation_in_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7384/5433/files/noridoxidived.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/autocad_civil_3d_basic_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/rogenesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8770/7290/files/mn_ducks_unlimited_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/karcher_steam_cleaner_sc1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3491/0113/files/fenton_growth_chart.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_01_sfnt_off000084f8.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 10536 bytes
SHA-256: 90cb6c2f4a665d8be1a503ada331f9d15aa4487ff1738be31a39e886113a8eff
font_01_sfnt_off000084f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 5052 bytes
SHA-256: 6e51cedeb57d775c47a58a8a6b3275e5fa27834f6078ed010b32c5dfe30da493
font_02_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 10840 bytes
SHA-256: 4a16e25a83bd7c9fd3c114b7a5995ed05905e4a0c7236c044012514ec56e4088