Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb37424580c018b8…

MALICIOUS

PDF

66.4 KB Created: 2020-08-16 23:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bfe48b6b99bef401df6a7f36a435e43 SHA-1: 050c8bc65619b03c054c9a3bd08cb2ada8adf0db SHA-256: fb37424580c018b8e5f829d018334185c5f5305d3e3495c885656e62b267b10a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bioavailability and bioequivalence pdf' and the URL itself, suggesting a lure to a phishing or scam page. The presence of a link farm heuristic further indicates malicious intent to distribute links.

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=difference+between+bioavailability+and+bioequivalence+pdf In PDF document text
    • http://files.summitviewchurch.net/uploads/1/3/2/6/132696029/jirefiv_wuxogowe.pdfIn PDF document text
    • http://mojut.blueprintsisters.com/uploads/1/3/1/4/131455069/8436287.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/1/0428/2885/7503/files/95394951404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/sumerian_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/70816787915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/39311760642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/45133638202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/xigiradozusiravuvaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1590/files/gowit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/revojidewukipemiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/disney_annual_pass_benefits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8522/5372/files/anisotropic_effect_in_nmr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/34123808984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/hey_soul_sister_ukulele_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0718/6843/files/vawalalazelabizosaxov.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 1

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_off0000c5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EF 5492 bytes
SHA-256: 1dd329b10c7e7b45457c4130ba242d3ed4d292d893d63df7e2f8d4b2547adbf9
font_01_sfnt_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 10196 bytes
SHA-256: 82bf1b8e0ad285ad03f53c7274805e342f4ead4d5fd36a9396ae8e8386123196

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