Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4214690575e0e8…

MALICIOUS

PDF

67.4 KB Created: 2020-08-07 12:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3239967d409a828f7798c74f4a4a23e5 SHA-1: 39dd87e1f8548113b71529e1b652141210ddb5c9 SHA-256: 7d4214690575e0e86abe9d5ffe5457ee76babadf6ad50a0e19f806f11181f575
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for SEO spam and phishing. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target keyword, suggesting a lure for free academic content. 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.com/pify?keyword=formal+language+and+automata+theory+by+puntambekar+pdf+free+download In PDF document text
    • http://files.katyprairiepromenaders.com/uploads/1/3/1/0/131070872/616ba6f03f0b5.pdfIn PDF document text
    • http://files.brittanybalcom.com/uploads/1/3/0/7/130775001/betemolefi.pdfIn PDF document text
    • http://mojeted.5thstreetfinancial.net/uploads/1/3/1/3/131380600/nazopaxujafazen_sazaro_labiluna.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/1/0431/3094/5693/files/44044089022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/cambridge_primary_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/10314905007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/67785548113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/90157998400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/6841921764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6108/4314/files/cancer_de_mama_signos_y_sintomas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/36472598466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/zoxima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/ripovapipedawowibopowanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/57060523847.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_off0000c702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC702 5628 bytes
SHA-256: 1226acd86d3727a623b123f4e9c957ad1b1cacb75a8576300d14e4b4c9a5ef25
font_01_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 11096 bytes
SHA-256: 96d16da20162dd4d8ace9ea499b89eccaef4ee1afbe832e49c6998a8d6745da8

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