Malicious PDF — malware analysis report

Static analysis result for SHA-256 86508f9459c77588…

MALICIOUS

PDF

39.4 KB Created: 2020-08-13 23:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a894f6731df07869166b9d585d4c1662 SHA-1: c2ce15912d909adf2efef8274cb292e424e9f30e SHA-256: 86508f9459c77588102cab070d14ec55510f45445bf19e8defa60dedef9f4ac4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as a "medical certificate form" and redirects users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, including a redirector, suggests a phishing or scam attempt. No scripts were extracted, but the document body and heuristics point to a social engineering lure.

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.cc/pify?keyword=medical+certificate+form++pdf In PDF document text
    • http://sinak.aafreda.com/uploads/1/3/1/3/131380177/acb3a5506ddb920.pdfIn PDF document text
    • http://jarodo.mollybernard.com/uploads/1/3/1/8/131856725/xodowaparex.pdfIn PDF document text
    • http://pagax.stantonmathclass.com/uploads/1/3/0/7/130776677/9523291.pdfIn PDF document text
    • http://files.mayflowerofbillings.com/uploads/1/3/1/4/131437117/4528144.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/1/0439/9369/4366/files/mugoxuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/89512712714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/xilemakuvelafagobuwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/54596732276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/mesa_que_mas_aplauda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/41260078332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/28480749952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/12301097372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/jojunobujafudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/29810939158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/50697672773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/22475719402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/tozelikelusizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/jolly_phonics_story_books.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 2

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_off00005a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 5128 bytes
SHA-256: a3a946b6d767a4bf231a1d8910229a368a3e1fea546ede68e47d8b338c413bae
font_01_sfnt_off00006b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 10584 bytes
SHA-256: 755775dcac552271373d165b5a24512fff31178e0bff8b3701787b0739afbd8f

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