Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b15b2751206b2ce…

MALICIOUS

PDF

38.0 KB Created: 2020-08-13 06:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54ea45bd6336f9a00c4f7f44f099933b SHA-1: a1f5166b91c421dc269bfdef7cdac203e4e3e049 SHA-256: 7b15b2751206b2ce19c3e9ad9c87561065b69a98f615f45aff67c83a607bbcee
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to malicious content, disguised as educational material. The ML classifier strongly indicates maliciousness, and the embedded links suggest a phishing or scam attempt to redirect users to harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wb?keyword=noun%20phrases%20worksheet%20for%20grade%205 In PDF document text
    • http://negok.first5460.com/uploads/1/3/1/4/131408970/peligoxakagoxaxilo.pdfIn PDF document text
    • http://files.mshaileyswebspace.com/uploads/1/3/0/9/130969053/dedaresas_sepero_rokawerewazo.pdfIn PDF document text
    • http://files.9thmediumregimentra.com/uploads/1/3/0/7/130776589/fanomemen_zagajusesufafud_supinabosepete.pdfIn PDF document text
    • http://files.tennisunderthestars.net/uploads/1/3/0/8/130814387/dofepisipexotux_kejeseziwod.pdfIn PDF document text
    • http://files.sarahcbenjamin.com/uploads/1/3/1/4/131437977/1653934.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/1/0430/8058/1274/files/58096544798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/61509914089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/jukasilukoruwowovamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/barracuda_heart_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6247/7479/files/cuales_son_los_derechos_del_nio_y_adolescentes_peru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/aquaculture_engineering_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/38343767218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/76540342803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/tobimujuwizosaruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/rurixivegomapurema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/design_techniques_in_software_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/wiwiz.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_off00005511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5511 5520 bytes
SHA-256: 1d08c400bc71ccb4f679b12296aeb02495baccd749975a1e22aec2a282f78d9d
font_01_sfnt_off000067ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 10328 bytes
SHA-256: f0100b7ca7ca360c6c2e27f98da3e5d1a9f03fb9a997bb086908162dc7751074

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