Malicious PDF — malware analysis report

Static analysis result for SHA-256 250d3b8ebb097162…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 15:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a3a5e7da5f9ff5762f7759f4f55f645 SHA-1: 5d699e12d9868b72e197ed75ef7255542376f512 SHA-256: 250d3b8ebb09716291210e89c539d6ed0aefe8cbe813e87104fd3989b0dc8a15
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to respiratory semiology and includes a URL pointing to a redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. The presence of a link farm heuristic further supports the malicious intent of distributing 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.cc/pify?keyword=s%25C3%25A9miologie+de+l+appareil+respiratoire+pdf In PDF document text
    • http://kuxajam.fuquafitnessadventures.com/uploads/1/3/0/7/130775519/bukomamar_mixigetedepedax_wusovoxo.pdfIn PDF document text
    • http://files.acironworks.com/uploads/1/3/1/3/131398224/xokusozame.pdfIn PDF document text
    • http://files.bymcustommusic.com/uploads/1/3/1/6/131637477/nenidejemupu_tozez_numivexek.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/1/0434/1638/7733/files/kubapibusufifutaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/kowigaxojidufesurotemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/nifitagufufusebowis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/algorithms_in_c_parts_1_4_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/30388576688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/dirulafobavibipuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/223363937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/eikon_basilike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/luganuwisozoduwemer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/97140513243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/jojewetosedi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEC 5608 bytes
SHA-256: d62e573c53f5479b3e27e99389a0e51b89c4129e752144ced46448823a12b74c
font_01_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 14672 bytes
SHA-256: 886af25cd782269cc45e1114ec72c66e5ac24023e62a28997444c9da159f609b
font_02_sfnt_off00009b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B88 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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