Malicious PDF — malware analysis report

Static analysis result for SHA-256 623de5cb89763d3f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-26 08:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6afec58230ef2add938fed53c04ded8e SHA-1: 38e40b8d2c15b5a2387e7c3931b3e5b839bb1add SHA-256: 623de5cb89763d3fa1b9185e7de207ac9c7f92e183abb4b7b88dd87977688966
202 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary redirector URL, https://ttraff.cc/pify?keyword=descargar+corel+draw+gratis+en+espa%25C3%25B1, is flagged as malicious and likely leads to a phishing or malware download page. The document body's text and embedded URLs strongly suggest a lure for downloading free software, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=descargar+corel+draw+gratis+en+espa%25C3%25B1 In PDF document text
    • http://files.karynmehusstudio.com/uploads/1/3/1/3/131398356/ferorofedavo.pdfIn PDF document text
    • http://files.elizaglyn.com/uploads/1/3/2/8/132814166/logetejir.pdfIn PDF document text
    • http://files.stephenwarrenassociates.co.uk/uploads/1/3/0/9/130969695/301432.pdfIn PDF document text
    • http://zisip.pulse-studios.co.uk/uploads/1/3/1/6/131606490/3472429.pdfIn PDF document text
    • http://files.antiochmissionarybaptist.org/uploads/1/3/0/9/130969182/suvorimuvu.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/1/0429/6232/1571/files/goxazonerabixekes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/fadadikov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/luturuwurikoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/bajokagedimosabuluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/weremipitedazejofagolaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/rolisoxigunobuxejuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7916/4064/files/duxidunagefananijus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/geoffrey_local_anesthesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/90127234674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/woxirutapozumiviwufo.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_off00005e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 5544 bytes
SHA-256: e3d65d053fc301e5f717a7b957526c0316ba4603038109e07c8fb45c03a71c4c
font_01_sfnt_off000070c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 14496 bytes
SHA-256: 9c64417561c719aa922cf8c355c367e77d4c8981868d09d951fd1fe88acaf164

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