Malicious PDF — malware analysis report

Static analysis result for SHA-256 2871d3de06eacb9f…

MALICIOUS

PDF

47.9 KB Created: 2020-08-25 14:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c608a27df999d4356a3e9330708eb57c SHA-1: ebc20e0c0f0c2d1e06c6bf89171553b43ac548f6 SHA-256: 2871d3de06eacb9fc90c3c053371aeaa7961cc1b60d0e685fe7d6c6ca422c682
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness. The embedded links likely serve to lure the user to malicious sites, potentially for credential harvesting or further malware delivery.

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=autoimmune+hepatitis+clinical+practice+guidelines%2528+2019%2529 In PDF document text
    • http://files.australasianhumanbiology.com/uploads/1/3/1/3/131379324/fexudoz-rilokazudodijo.pdfIn PDF document text
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131452840/fekobagedetip-rujegajobe-tibuz-zubonafanewuwi.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/1/0433/0687/7080/files/zavokalozetaxolemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/zenanezikezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/modern_arboriculture_shigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/dabof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5659/5871/files/hypothetico_deductive_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5029/4687/files/dutojezerowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/28105693440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/architect_cv_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9516/9950/files/california_real_id_paper_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/acupressure_points_chart_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/devijuwevalamefolak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5992 bytes
SHA-256: ed05555cbcb9465d05cc1036f3580aa389a74979f19957eeb79dbe380a49d38b
font_01_sfnt_off0000799e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799E 13240 bytes
SHA-256: 474e12912c4a9468f4e61c8ca90a6960b967cc798f5be13dcb1382e2adacf135
font_02_sfnt_off0000a444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA444 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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