Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf2d82669553a73…

MALICIOUS

PDF

56.7 KB Created: 2020-08-15 00:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b68ca9e9fb3289b9cc76c80e74749d5 SHA-1: 3c3789e415709c8c66adc7f09157d76e943e8ce8 SHA-256: bdf2d82669553a73a8d7b0c1bec55481817453660c7baf31834bd99f3a47bba7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL, which is used to obscure the final destination. No scripts were extracted, limiting the analysis of direct payload delivery.

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://ttraff.com/pify?keyword=solid+angle+arnold+pdf In PDF document text
    • http://files.stpaulautomation.net/uploads/1/3/0/7/130739835/jigenajoribipixef.pdfIn PDF document text
    • http://wadez.dawntrygstad.com/uploads/1/3/1/0/131070993/fezores-xotefixaz-pexekaxagazow-zizuxadape.pdfIn PDF document text
    • http://files.cpwarchitects.com/uploads/1/3/2/3/132302711/9216688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/epic_emr_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/38080775272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/an_enthusiastic_gilled_blob_is_on_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/built_to_last_successful_habits_of_visionary_companies_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/american_english_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/55808602626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/solar_energy_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/farmacodermia_por_anticonvulsivantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/nomanunawadokewimonubuxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/nakeza.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 PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA07E 5132 bytes
SHA-256: 56419bb8d44f2a8029d0c9d7cdd0b5755f299bed80e727b9fb72703bbe8c34ab
font_01_sfnt_off0000b204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB204 10640 bytes
SHA-256: 61ce2e9bd7980994b7083a44b9490ff8de3948d13193ec92fc58830650f4cca3

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