Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d4ed734521c6b1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-13 23:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8527e4bcd5b477bee9d57aaf24336ead SHA-1: 06cffb0206092b55e141903b982de4c0128257b9 SHA-256: 81d4ed734521c6b117daca9cf3cd4545f121370de7c5eec2acd092201a2508f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm designed to redirect users to malicious infrastructure, masquerading as a search result for educational materials. The primary redirector URL is identified as malicious, indicating a phishing or scam attempt. The document body, though partially obfuscated, contains the target URL and references to educational content, reinforcing the 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=pre+algebra+with+pizzazz+answers+page+190 In PDF document text
    • http://files.leannastibbonmakeup.co.uk/uploads/1/3/0/9/130969710/e1b024.pdfIn PDF document text
    • http://files.professorfinance.com/uploads/1/3/0/7/130775245/894232aabcd4f.pdfIn PDF document text
    • http://files.thenutritionhutt.club/uploads/1/3/2/6/132681690/rodebobafinim-guputo-xugede.pdfIn PDF document text
    • http://files.augustinoloprinzi.com/uploads/1/3/0/7/130776791/bidekapimup-xanibalijora-fedonevagugep.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/1/0436/0703/1966/files/xadejaxepotobawule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/juwemebozomizudiduba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/90947501740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/keronevodumetojovakal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/a_dozen_a_day_book_3_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/zegapipamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/anlagenbuchhaltung_mit_sap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/46970193860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/36143391082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/13521888126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/zexifoxow.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 5

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_off00005e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5712 bytes
SHA-256: 3dbceaa74803be18a53205765b66740f214a33c688de9fd70d6283724bf68bf6
font_01_sfnt_off000071e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 10288 bytes
SHA-256: 7a534d2a5d1373b73f9f1af88af97349002b2c8a32e86a4b6f95e7407d63d1e1

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