Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c16dcf037138539…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 08:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 668e5c31cb1b15c60bf4f41339ba8675 SHA-1: ff2b680b101becd73832a2069d54c58565958491 SHA-256: 5c16dcf0371385391ce5bd7b7ef1c2bfc0dca1481fddac285c9ed2af76f0282d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector link. The document body, though heavily obfuscated, contains a visible URL that is also flagged as a malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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=circuit+court+of+cook+county+online+forms In PDF document text
    • http://files.avmheartlandchapter.com/uploads/1/3/1/4/131407406/9978969.pdfIn PDF document text
    • http://mepata.landmarkpublicart.com/uploads/1/3/2/6/132681352/87f2d615eb12eb.pdfIn PDF document text
    • http://files.levinedesignstudio.com/uploads/1/3/2/8/132814250/8e89a60375c8850.pdfIn PDF document text
    • http://gogipubig.wayashealingpath.com/uploads/1/3/1/4/131407406/9682808.pdfIn PDF document text
    • http://files.ressource-therapie.com/uploads/1/3/0/8/130873918/5025190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/ti_83_plus_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1505/7062/files/breathing_apparatus_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/36588475872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/manejo_de_base_de_datos_en_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/magurube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/75084735651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/advanced_excel_formulas_with_examples_in_excel_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/nezitebarogidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/gujopok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/rotevutolonisoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/riselozedineme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/pernkopf_topographic_anatomy_of_man_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5507/7790/files/elastic_and_inelastic_collisions_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/79969839108.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C47 4888 bytes
SHA-256: 628fff817bd4b53e9b818c55b8f1eef15fb8c8cf19e8bc7b0c4b8e450183aa0b
font_01_sfnt_off00006cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD8 10292 bytes
SHA-256: a7b20c60f2edbcd2131ebd7d171c492a10c0434634fc9e2db1c05678fdde8640
font_02_sfnt_off0000901a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230