Malicious PDF — malware analysis report

Static analysis result for SHA-256 86436bc1253de693…

MALICIOUS

PDF

54.9 KB Created: 2020-08-22 01:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4eb38ffeaec443e1fd47b4b09a2347e SHA-1: e0ed5e56aa08153f42b274d53f28d84d4e9a8286 SHA-256: 86436bc1253de6930afd77b92a136fdc74001b8da22fce7b5f072356fa908fd7
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the heuristic firings suggest the document is designed to trick users into visiting a malicious site by masquerading as a helpful guide.

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.cc/pify?keyword=fidic+quick+reference+guide+yellow+book In PDF document text
    • http://mebevaxe.bezaleelbows.com/uploads/1/3/1/8/131871721/8c76d693b82946b.pdfIn PDF document text
    • http://files.marco-mazzini.com/uploads/1/3/1/4/131437229/a6421d94c.pdfIn PDF document text
    • http://files.justinpearsongalleries.com/uploads/1/3/2/8/132815015/7302710.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/1/0434/3355/8172/files/18th_amendment_pakistan_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/catia_v5_manual_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/bugelokujenezuxidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/99168081785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1842/3194/files/metamorphosis_in_arthropods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/tratamiento_absceso_hepatico_piogeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/korased.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/88146711458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/dovem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/sportsmans_guide_visa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C20 5080 bytes
SHA-256: 073a8320b14f820a1719f31bfb0f35647dcb95fdd4f3d952e004bacc1360f0c6
font_01_sfnt_off00009d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 10276 bytes
SHA-256: 2d5e5914221a9fb8e53610852a00f97dc3054f668a0b385da0efdbcd04a7178e
font_02_sfnt_off0000c069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC069 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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