Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf37755055216f7…

MALICIOUS

PDF

36.2 KB Created: 2020-08-24 13:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c50e27919d1c20c94420b77782be5dd0 SHA-1: de51a78d2a6fa0dc270ce7f9d3fb4fea7ba484bb SHA-256: 4cf37755055216f72f7178c3bebda8a1b79940b102e68733abd8809fa29edeab
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with heuristics indicating a link farm designed for SEO manipulation. One of these links redirects to a known malicious URL, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct payload execution.

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=chutti+tv+magic+wonderland+song In PDF document text
    • http://files.capecommunityorchestra.org/uploads/1/3/1/4/131437454/0d6524e208ea9.pdfIn PDF document text
    • http://files.eiotown.com/uploads/1/3/0/7/130739155/pomezubeg.pdfIn PDF document text
    • http://files.unimentalhealthday.co.uk/uploads/1/3/1/8/131856108/c4dcdcf.pdfIn PDF document text
    • http://files.shekinahgloryworshipcenter.com/uploads/1/3/2/7/132712129/02f2a5.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/1/0437/7313/2957/files/convert_string_to_int_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/joomla_responsive_template_quickstart_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/5995/5108/files/wodokakupop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/heath_ledgers_funeral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/gupitobuxoganuxuteju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/duzunikegerowakare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/rumopaborijigawabepanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/55019417632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/5574006286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/wakipubede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/zeniked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/diccionario_biblico_catolica.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 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_off00004e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6B 5412 bytes
SHA-256: 326758c0ebb1afd4ff8ea54613a4b445ef78c96bb4718054c12010bdef1bf652
font_01_sfnt_off000060b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B4 9928 bytes
SHA-256: 6641169c536436b0a1bd245c6d1af8808ca1c7a6302ad4f3af34d1d50daf6164

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