Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cadecb382c1a3b8…

MALICIOUS

PDF

35.8 KB Created: 2020-08-06 15:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78d8365eb7868c8a9ca1567254254b90 SHA-1: fc68f8607eb209e87aa59f20c0ab04756ef54203 SHA-256: 5cadecb382c1a3b8aa105548714c443f0f2f73d2a2cdd40ee53ba60c8ede00e0
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is part of a link farm designed to trick users into downloading files. The embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt, likely using a lure related to 'building construction illustrated 5th edition pdf download'. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

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=building+construction+illustrated+5th+edition+pdf+download In PDF document text
    • http://domapet.gardenincubator.org/uploads/1/3/1/4/131407148/6349234.pdfIn PDF document text
    • http://files.bestbroadbandsupplier2019.co.uk/uploads/1/3/1/4/131406507/lubukadim_xiwixojore_buxebudekira.pdfIn PDF document text
    • http://files.littlebluebowphotography.com/uploads/1/3/0/7/130775588/raxafuzelarurivex.pdfIn PDF document text
    • http://files.theroseonthecake.co.uk/uploads/1/3/1/4/131408256/9477421.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/1/0433/0687/7080/files/53522836856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/bobanudasexesapatitom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/raletapoluzilizujizezareg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/nijusuvive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/67408829192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8848/files/giwivejataluxosuwibedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/mekijufowazinafilewevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/wow_classic_leatherworking_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8375/files/credit_reference_request.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/luigis_mansion_iso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/windows_7_product_key_generator.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 3

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_off00004a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A14 5684 bytes
SHA-256: a55e12dea9c6034d60421d336aabb198a9560b6246d2da8baa432f0a96163ec9
font_01_sfnt_off00005d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7D 10864 bytes
SHA-256: 55ea5a5111aabbed6b28d0cf21d2779b6b8f340606ceb00d8f6f5e60dafc2962

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