Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fec2a537667154f…

MALICIOUS

PDF

59.7 KB Created: 2020-08-21 16:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 664b3dafa5effded3e6b0380faa59e1c SHA-1: 145d8a1f13bc5c6efcd32b398183a44001319d81 SHA-256: 8fec2a537667154f95f0be0da42ea627064ea507996872ddade0bc16b1c6838c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL 'https://ttraff.cc/pify?keyword=discrete+wavelet+transform+in+image+processing+pdf' is a clear indicator of a redirection attempt. The document body, though heavily obfuscated, contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links suggests a SEO poisoning or link farm tactic to distribute the malicious payload.

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=discrete+wavelet+transform+in+image+processing+pdf In PDF document text
    • http://daniwame.timezone-cbd.com/uploads/1/3/1/8/131856271/mituvu-vuvesukozumovu-gijefexave.pdfIn PDF document text
    • http://vifujo.maconretirementeasy.com/uploads/1/3/1/6/131607712/kusafozigoxuwadafe.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/1/0430/7556/7770/files/16131122161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/12722567033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/99422217727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/samorupuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/pewoxog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/kosalojebemadidune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7860/3167/files/postgresql_backup_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/applied_physics_for_engineers_by_neeraj_mehta_free_download.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_off00008b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 5628 bytes
SHA-256: 75a34ffe4829a8d75096c1593fef0a55fe6ef8d02ccf5a64791b345ee9903223
font_01_sfnt_off00009e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3B 14476 bytes
SHA-256: e565559470e31427305f5398370910d7d260c2c42c2963f6775681dfb68effcd
font_02_sfnt_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 16224 bytes
SHA-256: e7820fc51e823c9510b69cd30def3c6041c113b552710f50053ecd1ea592d451

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