Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71283249682e052…

MALICIOUS

PDF

47.4 KB Created: 2020-08-09 04:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d20111d2c76295b6f00e4a68f7939c9 SHA-1: 3e8dd82604a2c7cd0b479bf1e71d1f784dc17ac2 SHA-256: c71283249682e052ca6f0415c667731536083d0c154f24fcd8f9ff5359e535f9
194 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'pdf to word online converter free download' and embeds numerous external links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or redirection attempt. Another heuristic flags a large PDF link farm, with many links hosted on 'cdn.shopify.com', indicating potential SEO manipulation or a large-scale distribution effort. No scripts were extracted, but the embedded links and the nature of the document body strongly suggest a malicious redirection or phishing attack.

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=pdf+to+word+online+converter+free+download In PDF document text
    • http://dikiboki.clickclackfitness.com/uploads/1/3/1/8/131856772/d418269b.pdfIn PDF document text
    • http://files.eccrotherham.org/uploads/1/3/1/3/131398139/5168434.pdfIn PDF document text
    • http://files.nycancerfoundation.org/uploads/1/3/1/0/131070178/9f6f03d.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/1/0433/6173/0719/files/feliwelivenududurodefeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/27256324011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/nesinoxugisuzijewoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3647/0430/files/std_string_formatting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/texuzibolufafotijusozij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/symmetry_financial_group_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/ceclor_bd_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/94667012651.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
🗂 Part of campaign: clickclackfitness.com 3 samples

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_off00007cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBE 4992 bytes
SHA-256: 9daa51d7c4aba1a05620b54d2dc3b5542b764e65d0b66aaad61c28c70cd8f5bb
font_01_sfnt_off00008de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE2 10128 bytes
SHA-256: 2c324418d6a1f859b17bc2fb46c16b9b202f43d9db80be1a5bc37d717dc5f4db

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