Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f67e1b476c4348b…

MALICIOUS

PDF

57.2 KB Created: 2020-08-24 19:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d089c1c0dc71a47e1f5dc6dda2e663d2 SHA-1: ac0eb63d801622a5c63e43a24322a21a0347f18c SHA-256: 6f67e1b476c4348b5b2224a5812ea83fc73c903ac1b76ad8b2ffad8c3e51a326
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically identified as a malicious redirector by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a phishing or SEO abuse tactic. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of the file. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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=buckingham+theorem+pdf In PDF document text
    • http://files.scireinke.com/uploads/1/3/1/4/131453989/026683946e.pdfIn PDF document text
    • http://rubozu.victorygamers.org/uploads/1/3/1/4/131406436/1087045.pdfIn PDF document text
    • http://dovotum.ncaircompressors.com/uploads/1/3/1/4/131407181/zavejupafupi_ranipuduwiwer_xepebubik.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/1/0438/2497/1936/files/31754037047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/nefawibanexosazusopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/juguwexibetojedod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/vesejoxidaxowasiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4917/2643/files/dmsa_renal_scan_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/kuzokirofitawakarafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2852/6742/files/ims_advanced_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/wazuzerapavofebodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/47891940945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/reflexive_banach_space.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 2

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_off00008afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFA 5472 bytes
SHA-256: 734c09390ced7b2262dc420a7499da4a553ccd77c73f798443308f4d402f20ab
font_01_sfnt_off00009d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D68 10908 bytes
SHA-256: 974985d5ed7a1c83cd290c5590f2119ff31c94fa08f25b2b8365e70d3e283f49
font_02_sfnt_off0000c2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AB 16136 bytes
SHA-256: 63dd88a80e10430f79302dbe00d75f9e9d920251693d6bae18f5711e4c3eda3b

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