Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7beae099411e4f…

MALICIOUS

PDF

37.5 KB Created: 2020-08-12 01:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1597fb15f28c614fc70040e76bc483e4 SHA-1: bab13e63f2172341322bd02d13bf908d078f52d4 SHA-256: 5c7beae099411e4f022aacf74697b540c425debf28d4c362ab2cf44042ea902c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a free PDF download. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple embedded URLs pointing to redirectors supports this. The document body contains the primary malicious URL, which is designed to lead users to further malicious content.

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=nick+loehr+s+bijective+combinatorics+pdf In PDF document text
    • http://levar.andreacontee.com/uploads/1/3/2/8/132814930/3168354.pdfIn PDF document text
    • http://kezazitiz.kimandcandice.com/uploads/1/3/1/4/131482992/kebujivumelawerotof.pdfIn PDF document text
    • http://files.itfcwomen.co.uk/uploads/1/3/1/4/131437775/nasuvoj-vudexevavoj-fazatixikizufa-xosakaxizo.pdfIn PDF document text
    • http://files.chelsealanephotography.com/uploads/1/3/1/4/131455398/f878be.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/1/0430/2379/4337/files/business_environment_text_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/48646785938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/nepuwumubafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/87371206759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/niraguxadaguwatuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/27466599174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/26546531558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/79934476453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/463298507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/gypsum_board_ceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/ziwukesuwugojeme.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 4

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_off00005472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5472 5704 bytes
SHA-256: 60de4ca7495af9fd76cab7a50ec50691c0277cdf1b34f83e8259a5473bc4015c
font_01_sfnt_off000067af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 9832 bytes
SHA-256: 7acc823147848555ad2636578ca6f659454746eea9cc7086a743b5cb26c14170

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