Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1913ca7b879dda…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 23:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25f6af54a892e8b96f7d65ae49377816 SHA-1: 01c90eeab135f809f963b6bdb817d1e9de983b20 SHA-256: ef1913ca7b879dda1a41859f812b299c03998882faad0541dfffb8c4fac11e67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high number of embedded external links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'angiosperms and gymnosperms'. The presence of numerous links, including to a redirector, suggests an attempt to drive traffic to malicious infrastructure or manipulate search engine results.

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=similarities+between+angiosperms+and+gymnosperms+pdf In PDF document text
    • http://files.maurigc.org/uploads/1/3/1/4/131407547/fuvaxumo.pdfIn PDF document text
    • http://files.fordjudoclub.org/uploads/1/3/1/6/131636806/b5ad2318f8f665.pdfIn PDF document text
    • http://files.lifesurfer.studio/uploads/1/3/0/7/130775431/d5c0cc.pdfIn PDF document text
    • http://files.thewanderingbays.com/uploads/1/3/1/3/131398533/9127896.pdfIn PDF document text
    • http://files.bradleystokejudo.com/uploads/1/3/1/3/131384306/2109482.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/1/0429/3653/3151/files/25580459247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9380/1625/files/siwebofizinekopusasaronin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/tupivolomiwidotosumetuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/wugebujudininegipirozabob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/zajebelomuxobabunokun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/83455292430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/megobebulasivudemodirej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/73194910326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/47144536271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/nomofivoke.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_off000075b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 5588 bytes
SHA-256: ee1176297cea12ac0dabe990616845319aec151358b0d18b3dc07d250e89b139
font_01_sfnt_off0000889a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889A 10088 bytes
SHA-256: e6e2f741a9dcffb096c7487023eaadd268e8e5e49a46e47c951f73533d09254a

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