Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6cea13b381b4fc…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 08:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9551847feb3e2c90768861ac8dc85be2 SHA-1: fc36b8a65058e6c446272aae8b6f5db6862769d6 SHA-256: ef6cea13b381b4fc9de9f2efa7d9c77443fa82b7ccc764b7fafc79f763eadbf4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While many Shopify links were present, they were mostly confirmed benign. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=data+analysis+examples+pdf In PDF document text
    • http://files.lauriceimani.com/uploads/1/3/1/3/131381422/padivurodu.pdfIn PDF document text
    • http://files.thesledshed.net/uploads/1/3/1/3/131380052/5e115717d2e55f.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/1/0431/2930/7287/files/bold_and_determined.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7221/7237/files/66598556109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/aeroplane_landing_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9121/4743/files/illinois_foreign_corporation_annual_report_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/gunisevosozopotevevabefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7766/4929/files/75633211826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/83291705420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/73277640039.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 3

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_off00006365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 5260 bytes
SHA-256: cb7739d1ea7ee40da15484e93ee668de36cea6b5dffd4aea21a1be3ffd10b0a8
font_01_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 10296 bytes
SHA-256: 83d9492aef10086eb4501bcdbbb64dc8524d7ccaa729d34bf71bfc821809d519

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