Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a525324641fca4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 08:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c91053021a4df13a658dd6b18a7ce3d SHA-1: e085c9b7a60e6ca2795f264f2aaeeeb7a1987931 SHA-256: d2a525324641fca44d4aa1e9fc19cbcf99b65ed2b7db22003d97a9e8b0519275
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the redirector and several other URLs that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector suggests a phishing or malware delivery attempt.

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=libro+biopsicologia+john+pinel+pdf In PDF document text
    • http://files.olathesouththeatre.org/uploads/1/3/1/0/131070872/ludev.pdfIn PDF document text
    • http://files.k7-13.org/uploads/1/3/1/6/131607075/5fdb1e870.pdfIn PDF document text
    • http://tunugeko.naianinternational.com/uploads/1/3/0/7/130776644/449930.pdfIn PDF document text
    • http://files.northcoastknitting.org/uploads/1/3/1/3/131379296/wuwelijivipepij.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/1/0441/2263/6440/files/jquery_ajax_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5658/7174/files/1232583575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/demand_driven_material_requirements_planning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/95541939045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/gafiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/april_current_affairs_2020_ssc_adda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/93223294338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/22201640399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/blueprint_book_nicholas_christakis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/wodut.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_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5576 bytes
SHA-256: 7447981e5e009a51ca0df93c5de27812672cb7b638a73239e07e4a395df124bc
font_01_sfnt_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10156 bytes
SHA-256: d436440285a15353088a8115150cae4906cdaa5f55a9170693c5cac032288292

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