Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c167ce921e80a5b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-20 20:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f55b941ca95db4c018527854d20f7e1 SHA-1: ad77b0369ac016e1c8ec0d29ec0d87c9f61812dc SHA-256: 5c167ce921e80a5b22d86de8e4ec1722582fa76f66b3a1faf42869c206ff9b87
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm strategy, likely to disguise malicious intent. The presence of embedded URLs and the heuristic firings strongly suggest this document is designed to redirect users to malicious infrastructure, potentially for phishing or malware delivery.

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.com/pify?keyword=simplifying+exponential+expressions+worksheets In PDF document text
    • http://files.govindaincense.com/uploads/1/3/1/3/131379117/fokalazepedibes_giposad_zorugejav.pdfIn PDF document text
    • http://jepode.klassybks.com/uploads/1/3/2/6/132681590/nuxazalejebof-nazetonex-mesibabaguz-gorisefiparafof.pdfIn PDF document text
    • http://files.twocann.co.uk/uploads/1/3/1/0/131070367/229c43d25.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/1/0435/7213/4049/files/wonazog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/44500298567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/pathfinder_advanced_race_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/adverbs_of_sequence_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/xazalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/segexoladegesowibetigis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/38880875325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/kexaleribefoxusoxum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/85643774167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/encyclopedie_berbere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/43204373257.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_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 5744 bytes
SHA-256: 3216672600cace4e73398e62e5da799be00670cdbc9d669988cf94a586553e38
font_01_sfnt_off00007798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 9764 bytes
SHA-256: 4ff28f77ea9b7a7d69d703bac76b88159abb63363c6227f33ad4ec64bb58d435

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