Malicious PDF — malware analysis report

Static analysis result for SHA-256 720c3307d85f47af…

MALICIOUS

PDF

45.8 KB Created: 2020-08-16 18:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ea479053e6ad47512dafb5213ea348e SHA-1: cc3d963ad9d7964c9dcf932e84c961183108ea3e SHA-256: 720c3307d85f47af73229e76338a8e2d1e4776e207ae335576e43ab9d2cb17ae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The primary redirector URL is associated with malicious infrastructure, suggesting the document is designed to lead users to a malicious site under the guise of a free download. The ML classifier also strongly indicated 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=ambulatory+ecg+report In PDF document text
    • http://raluluwoz.nicolakeenonstage.com/uploads/1/3/2/8/132815094/xelowiledetumefive.pdfIn PDF document text
    • http://files.sweetenyourlife.com.au/uploads/1/3/2/6/132682090/8208585.pdfIn PDF document text
    • http://files.jaredwolt-lx.com/uploads/1/3/0/7/130739603/lujovepen_fiterawek.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/1/0437/2060/5848/files/autonomic_nervous_system_physiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/nujomivawisid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/71386477937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/antimicoticos_en_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1144/8727/files/font_point_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/jikazug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/2561789508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/could_you_not_tarry_one_hour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/17035999229.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_off000074a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 5304 bytes
SHA-256: 14b88bd930994f460a3c8360a753c3b05fefa5175fb6e62da4796e21ce4d631e
font_01_sfnt_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 10652 bytes
SHA-256: 832bc80824253a84f0c8783eae0cc0b2d8689a9babbc491a2dc9e1fe59c5e140

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