Malicious PDF — malware analysis report

Static analysis result for SHA-256 718cc3b3fe5edb59…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 04:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f564d19b5fcad339c0f04f20fce7776 SHA-1: 6d41a6cae62f5f1b6b2151a242cd118e83055e44 SHA-256: 718cc3b3fe5edb599ac168a9aeab11b3800689cebf7482e897080023355e115e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This indicates a phishing attempt disguised as a free textbook download, likely leading to further malicious content via the redirector.

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=brunner+and+suddarth+s+textbook+of+medical+surgical+nursing+pdf In PDF document text
    • http://teloxejid.thegreatmanginoadventure.com/uploads/1/3/1/3/131384169/0afd5d646affab7.pdfIn PDF document text
    • http://files.chaletalpemassif.com/uploads/1/3/0/7/130775679/vikokof.pdfIn PDF document text
    • http://files.turbobeads.com/uploads/1/3/2/6/132681012/kalogowife-bidarag-repivepulex-jurosafatoribi.pdfIn PDF document text
    • http://files.craigalanbrown.com/uploads/1/3/1/8/131856392/totelepopojoxa.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/1/0430/8720/0418/files/process_dynamics_modeling_and_control_ogunnaike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/jupoxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4805/0586/files/sapoxojinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/dizimisimolisumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/leanan_sidhe_persona_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/89198703822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/39362492290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/16386250570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/56541016127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7325/5062/files/pukelumizanizageti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5892 bytes
SHA-256: 25a5fccdba67bf8f1a1664a04540698f7f2ab81960ddb12e9e3fb747c12cdfe3
font_01_sfnt_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000805c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 10504 bytes
SHA-256: 4b8048f5d308be2ad708533606c527b486cf3fabdd111c69702c7011c850895a

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