Malicious PDF — malware analysis report

Static analysis result for SHA-256 37976162e41d9e31…

MALICIOUS

PDF

35.6 KB Created: 2020-08-23 18:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b65862b9685494d44f033aeb7fb4c91 SHA-1: 4ae383a4d52e0ca699f18640c80d72be0cd06428 SHA-256: 37976162e41d9e31627c07b6ffc75e775fee72e55647d002fb5e0f9d8d8564cb
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=design+all+star+cheer+uniforms+online', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=design+all+star+cheer+uniforms+online In PDF document text
    • http://files.diabetic-cyclist.com/uploads/1/3/1/4/131483491/minaf_jekokemesarudu_zuwuvo.pdfIn PDF document text
    • http://zuted.bathurst75fc.com.au/uploads/1/3/1/6/131637830/gaminamabineguzi.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/1/0432/5425/1670/files/ropereloxiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/un_anthropologue_sur_mars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/kotiravuzerefagilenofuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/worksheet_maker_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/kogusorabigufegegapinikig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/facebook_free_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/paluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/pipapizazur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0475/6121/files/vomutudadiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9539/9325/files/46787808406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/84703169863.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 6

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_off00004d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1E 5292 bytes
SHA-256: 2908ac08869227431da3c5b67f7fb9c256ead695ad949253b4d45dbde8a3519b
font_01_sfnt_off00005ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 10124 bytes
SHA-256: 4266daf4094a6cbe66604e097c9f438cfbe28ff88bdb2fd571d2d87d7a24271f

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