Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecef7b00279d143f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 04:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 920727748df1968617190c9a01da773d SHA-1: 304d40bf480b9b4bfb710beeff58fa12f16fe403 SHA-256: ecef7b00279d143fc08c34c5d1b7a188f8135acef154de95ef84271f0c6fa623
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a book download. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm intended to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=understanding+operating+systems+7th+edition+pdf+download In PDF document text
    • http://files.myjanniejewels.com/uploads/1/3/1/6/131607029/gakiruzaratipenixono.pdfIn PDF document text
    • http://files.mylifeintechnicolor.com/uploads/1/3/1/4/131409794/teropupapesa.pdfIn PDF document text
    • http://files.eeutah.org/uploads/1/3/1/8/131872055/roxevuvamurikeguv.pdfIn PDF document text
    • http://files.cluesescaperoom.com/uploads/1/3/2/6/132696558/nimuratup.pdfIn PDF document text
    • http://files.sawtoothmountaincider.com/uploads/1/3/1/4/131437671/3063207.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/1/0431/0522/2813/files/94627220173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wodiparip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/vanizex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/wapapunuziguve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/92551957881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/94099923579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/lifeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/fenuwowidexaxukafogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/degaguzizafuwaxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/dawidadazovunavesa.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: cluesescaperoom.com 5 samples

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_off0000732c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732C 5720 bytes
SHA-256: f7d12fb159eb3911609c24020c671b30655f858a3e0ef8c5c7320284ce7e9ac0
font_01_sfnt_off0000869a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 9928 bytes
SHA-256: bf85b22820ca7d60f53a51cda126cec6fd26ac3898a65eabc108f29303f08edd

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