Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fd71ac54687e9b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-27 23:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4789edcb31821023ac9519ab70f22d01 SHA-1: 53f21a303dcda0d81a069bdcb76f422f142b3d3b SHA-256: 75fd71ac54687e9bf7eeee73a420de5089d133fcbedb660689ee6efcd9cc3f27
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains text suggesting a 'word search puzzle' lure, which is likely intended to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to a phishing or scam attempt.

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.club/pify?keyword=sopa+de+letras+de+informatica+con+20 In PDF document text
    • http://files.kimlista.com/uploads/1/3/0/8/130815228/ae3b6340795a.pdfIn PDF document text
    • http://files.sepcal.online/uploads/1/3/1/1/131164081/3236618.pdfIn PDF document text
    • http://files.sugarrimbar.com/uploads/1/3/2/7/132710791/bifimejetezofitufaf.pdfIn PDF document text
    • http://files.nicolloabe.com/uploads/1/3/1/3/131379406/vujikawibij_tulefoto.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/1/0432/0083/9842/files/38626353570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/81134194173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/32148391890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/deep_learning_algorithms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/applied_linguistics_to_foreign_language_teaching_and_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/3477655008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/lekufatutelepovune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/bakliwal_tutorials_entrance_exam_sample_papers.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 7

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_off000057eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EB 5676 bytes
SHA-256: 6d1b8769545f1d3f9720b8ca180aa150a7e6b55c73d3e6676a68bb491a98fbd7
font_01_sfnt_off00006b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 13952 bytes
SHA-256: decd19177e53e875e2c97a7c01b072177dc4f30110a0422f0e2d36ef6ba1f2e0

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