Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c937d15a02bf9a0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 13:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e47e7fb79bfdc0bb7dce7a5e4c2367b SHA-1: a7654b56480306a1d9c49d930ecb1b470ed97062 SHA-256: 7c937d15a02bf9a05140688c9955392040d43860ba641c408ba3dc507eb08d1b
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 URL, identified as a redirector for phishing and SEO spam. The document body, though heavily obfuscated, contains text related to 'video converter software free with crack' and the malicious URL, indicating a lure for potentially unwanted software. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics confirm the presence of malicious redirector links.

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.ru/pify?keyword=video+converter+software+free++with+crack In PDF document text
    • http://tinaba.carolineheffernanactor.com/uploads/1/3/0/8/130814161/c92865c3.pdfIn PDF document text
    • http://files.rycroftlabradors.com/uploads/1/3/2/6/132680813/zisojiva_gorawuzi_rodewatadiwa.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/1/0429/1090/8572/files/fimizipotebudigosotadavov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7599/3505/files/namodevaxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/romoluxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/tovepasejezilobitada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/pdf_bhagavad_gita_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/reading_comprehension_worksheet_for_grade_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/riteragepelavegatemasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/peter_handke_justice_for_serbia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/danuxoraluzemadisasesul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0511/5544/files/pizeketidotifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2701/2507/files/print_tensorflow_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/pazizikabibimimo.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_off000060f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F1 5260 bytes
SHA-256: ea7fd14fe0afd03b5a59dc65fd659c280c0db641e743769a7148d8bd89bd396e
font_01_sfnt_off000072de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 10052 bytes
SHA-256: a7237f65b90f47164a45662a6434c9a8d0e3f02de6a530209dd40d386ce2716e

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