Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b232479fa1c19f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-10 08:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab8bd4bc206daa94f80c1f8aeae64a78 SHA-1: 7fdec88052795828702d380a9f6ff3287c684ed3 SHA-256: 25b232479fa1c19ff3020632f97d172ce3af9aec2f24c31e9b8d8b1fd4b80ed1
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the text 'Pediatric cases for medical students pdf' and the malicious URL, suggesting a lure to download or view content. The primary malicious IOC is the redirector URL which leads to further malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pediatric+cases+for+medical+students+pdf In PDF document text
    • http://files.fullcirclearts.org/uploads/1/3/1/4/131407406/jadukakunegadewesa.pdfIn PDF document text
    • http://files.the-sas-mom.com/uploads/1/3/1/8/131857970/pugezem.pdfIn PDF document text
    • http://kuwerizag.alwaysanindian.com/uploads/1/3/1/3/131384635/556921731f6.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/1/0438/8149/6744/files/zudat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/pitari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/screensavers_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/80123745491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/waves_mercury_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3043/6247/files/75985762839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/teacher_peer_evaluation_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/minecraft_middle_earth_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/gisadilakisefujejemuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/55992814467.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
🗂 Part of campaign: fullcirclearts.org 5 samples

Related samples 3

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_off00007dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 5300 bytes
SHA-256: 24a8180725fb979506858fec2990f57622f1cadcb704984e7da65371da58058d
font_01_sfnt_off00008fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBB 11324 bytes
SHA-256: 2f91e11ebf808a7697e7833f6c0fcd64831877e2093d4888605f2eeb1c3c3734

Open this report in the interactive analyzer, or submit your own file for analysis.