Malicious PDF — malware analysis report

Static analysis result for SHA-256 37159aeeb4a81b16…

MALICIOUS

PDF

37.2 KB Created: 2020-08-20 04:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3aabe9be686443a2bb9d0ca41c9ca2d8 SHA-1: f122b562640d3286dc500756d6331331290d5fad SHA-256: 37159aeeb4a81b160eff7158e16c8e8b83029c8aa24bab8ce7893a6715c91838
194 Risk Score

Malware Insights

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

The PDF file contains a lure text "Cuddle application form" and embeds numerous links, including a critical link to a known malicious redirector at "https://ttraff.com/pify?keyword=cuddle+application+form". The file also exhibits characteristics of a link farm, with many external PDF links, suggesting an attempt to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the primary malicious activity appears to be redirecting users to harmful sites.

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=cuddle+application+form In PDF document text
    • http://files.megangrimesphotography.com/uploads/1/3/1/3/131378791/606b5d6116.pdfIn PDF document text
    • http://files.tadaa.com.au/uploads/1/3/0/7/130776728/xusalev-fegokofujo.pdfIn PDF document text
    • http://files.davidbuswell.com/uploads/1/3/2/7/132741169/sosipemusawa.pdfIn PDF document text
    • http://kajegi.commercial13.com/uploads/1/3/1/6/131606490/gebazi-zukazesitikale-xubovijaga.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/1/0429/6232/1571/files/83723774421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/logical_reasoning_questions_and_answers_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/12532023678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/introduction_to_chemical_reactions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/57260271919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/berliner_platz_2_lsungen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/84414484037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/97247841775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/65179743558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/56943554779.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 5

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_off00005474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5474 5028 bytes
SHA-256: 6d0379d1082df18bb5f1ada7932de7d537147af28d83cf84499071b78cc386be
font_01_sfnt_off00006572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 10240 bytes
SHA-256: dea10ac994028671f15f9b085b67f5185cbb31f76e84e6d908fbc2caf2ec9a9c

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