Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce3d9481c44513e…

MALICIOUS

PDF

53.2 KB Created: 2020-08-19 15:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43b58240e63e8926344495d553fe45c4 SHA-1: a0d7a662b6817fabc8b50b484082f7ae8bd38c32 SHA-256: 5ce3d9481c44513e48f6fdea61e58cf6393419ad96d1e0e6792da296aeeb7aa7
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, suggesting a phishing or malware distribution attempt. The document body, though obfuscated, contains text and URLs that mimic a worksheet, likely to deceive the user into clicking the malicious link. The ML classifier strongly indicates maliciousness.

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/pify?keyword=4+congruence+and+similarity+worksheet In PDF document text
    • http://files.buildingbetterbonds.com/uploads/1/3/0/8/130874529/9291668.pdfIn PDF document text
    • http://vexarej.mairiwilson.com/uploads/1/3/0/9/130969036/petubif.pdfIn PDF document text
    • http://files.natural--living.com/uploads/1/3/2/7/132710601/7720991.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/1/0427/7554/3964/files/bsc_3rd_year_maths_question_paper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/vuzedugoveletum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/metijojatumoxexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/tawasaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/chasers_of_the_light_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/fafel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/74527202210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/38397015531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1696/1430/files/35046198037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/caracteristicas_psicologicas_del_adulto_mayor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/33740812669.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 8

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_off00007d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 5604 bytes
SHA-256: 3ac5c1cb604c3383ae57b89e076c5fcb4970c5f2fa696a5abd8f35c0b363c26c
font_01_sfnt_off00009000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9000 10052 bytes
SHA-256: cf8ad3aed2b138e6f83440f6d264bba632f6b8dbcefd8a9dcc76bfc081f53268
font_02_sfnt_off0000b268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB268 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6

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