Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd3307dd49c0f43…

MALICIOUS

PDF

48.6 KB Created: 2020-08-16 22:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e32acf2d44b699894e75e165f621732 SHA-1: 3bffc39c2aaf23a3b3c09157a8dd9199a2adffdd SHA-256: fdd3307dd49c0f435c08162610f1b978a8f73f49d7b21cae6e654eaa36cd2b9d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'dental anomalies in children' and mentions 'wkhtmltopdf', indicating it's likely a generated document. The primary malicious IOC is the redirector URL, which is designed to lead users to further 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=anomalias+dentarias+en+ni%25C3%25B1os+pdf In PDF document text
    • http://files.ps195magnet.org/uploads/1/3/0/7/130739027/70851e18.pdfIn PDF document text
    • http://files.planoeastbasketball.net/uploads/1/3/1/4/131453615/ziparewow.pdfIn PDF document text
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdfIn PDF document text
    • http://napujazil.mindbusterstrivia.com/uploads/1/3/1/4/131438437/f868f8c92b84ffc.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/1/0430/7949/9940/files/69281836798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/vovagetuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/ritirekete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/sanyo_air_conditioner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2406/8258/files/biblical_hebrew_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/wodapubavofakololutof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/android_automotive_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/54660806232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/406384438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/81575934407.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_off00007ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 5388 bytes
SHA-256: 686f310ffc1ca9034e6255680ccebdc2e44a1c21c7c4d1457a91e3466756c217
font_01_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 11824 bytes
SHA-256: 9c12411316ea484267829450c480defb4d1baac145bf5a7cfd5a9f0244bf14c3

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