Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a3ed3947c87e41…

MALICIOUS

PDF

55.8 KB Created: 2020-08-08 05:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27aae67af8fd1f2333b1e37faa00c7f1 SHA-1: d81e9ce01190124254dfdb89d30b85e332cb7a56 SHA-256: 55a3ed3947c87e410c8b90687eb775300fc66cdd4ee19528bc958bda3b74491b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, specifically 'https://ttraff.com/pify?keyword=cable+stayed+bridge+construction+pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=cable+stayed+bridge+construction+pdf In PDF document text
    • http://nimuduzot.moot.nilsinternational.org/uploads/1/3/1/8/131856462/8e98e3f28a47.pdfIn PDF document text
    • http://files.hannahsealy.com/uploads/1/3/1/0/131070476/6191173.pdfIn PDF document text
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.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/1/0428/9835/8432/files/18983443830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/95293758695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/juzelowotawijejuparikim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/rurigajimefut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kiragin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/tiparerurimip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/rowenil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/keyboard_key_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/xigafawupugidifafomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/46544296622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/kepunivuguganabeb.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 8

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_off00009c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8D 5472 bytes
SHA-256: ffb3320d6b03f7adecf7e5c25bcd416f1dfc8eb1ef21dfbd24970dedff5df26c
font_01_sfnt_off0000af35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF35 10208 bytes
SHA-256: b8ebf0dc63cceef67a3cdf52f1d0400ad43ffd6698db57fc488dd625e8046d3c

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