Malicious PDF — malware analysis report

Static analysis result for SHA-256 7603d052a0c6b665…

MALICIOUS

PDF

43.6 KB Created: 2020-08-05 11:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: deab383c553914f830a8ceb3d28c31a9 SHA-1: e843f169fdb48121166c0de9776502b404fcce9a SHA-256: 7603d052a0c6b665420a329c2354bd7dd4b7658b3c0c294ad758b68286fe8ab6
194 Risk Score

Malware Insights

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

The PDF contains a link farm and SEO redirector designed to trick users into downloading numerous other PDF files, masquerading as academic resources. The primary redirector URL is identified as malicious infrastructure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites.

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=clinical+cardiac+pacing+defibrillation+and+resynchronization+therapy+5th+edition+pdf In PDF document text
    • http://files.icsocal.org/uploads/1/3/1/8/131871658/ruxeridozosovove.pdfIn PDF document text
    • http://files.guyhang.com/uploads/1/3/0/7/130775490/zejoresuzu.pdfIn PDF document text
    • http://files.myartscreations.com/uploads/1/3/1/0/131070597/2337454.pdfIn PDF document text
    • http://files.ashleighcaudill.com/uploads/1/3/1/4/131453436/kesani.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/1/0437/2588/1498/files/algorithms_robert_sedgewick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/biribexobibesinewobikox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/65438889151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/jazepekuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/78339118624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/54363953718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/vunazedabakeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/kingdoms_of_kalamar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/nsk_bearing_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/nutajojunemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/90300647149.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_off0000687f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687F 5736 bytes
SHA-256: 1474dca2fea66167bd7e07f374d2c254b2855e190a90f9c912c7321db69fb058
font_01_sfnt_off00007c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C07 10712 bytes
SHA-256: 2b868445f9fa042aa4a8357e715971a9a4f9c37162e80248d2dfa28d09bf3b25

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