Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f1ad76164c00fc…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 14:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6529c3bdc6c9014ebb8093821ca4a1c8 SHA-1: 0f12c1ed4613d9277a62671439a1b716882b2ae3 SHA-256: 87f1ad76164c00fc2985c7c08a78c5e53025342be23f81b0ddcdf1fed5d81b96
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to redirector infrastructure, specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector designed to lead users to potentially malicious content. This indicates a phishing or scam attempt using a link farm to distribute malicious content.

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.ru/pify?keyword=free+radical+polymerization+mechanism+pdf In PDF document text
    • http://files.gordonptandwellness.com/uploads/1/3/0/8/130813888/rakajulewud-rebok-roxapowugifij-lupema.pdfIn PDF document text
    • http://files.andreadoylemusic.com/uploads/1/3/0/7/130775292/1294fe626014e.pdfIn PDF document text
    • http://files.deevinestudio.com.au/uploads/1/3/2/6/132695663/dixidujulezamom_nepupedisadaxo_zadesuwawora.pdfIn PDF document text
    • http://files.vcgallery.org/uploads/1/3/1/8/131856381/rokererukirejakifu.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/1/0428/9835/8432/files/xoxolesusoziviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/grounding_earthing_bed_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/nafiwogowexamobapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/tejolefaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5346/0130/files/madinah_arabic_reader_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/xunuxasakuxelerovipazara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2501/4685/files/8939288622.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 8

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_off00005f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F27 5504 bytes
SHA-256: 9a3294e3873cbc2c00e186e859a01af25dff0d3480081d64d31b44336c487bab
font_01_sfnt_off000071be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 9908 bytes
SHA-256: 2b0a1391f296f3ab0a9fe324f12db6a7ab0862f28e72d694f4185355053031a5

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