Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efe5436fa4527be…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 22:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 815d369ff90d9b5eaea2120cfa57c81a SHA-1: c30280f7dfe8e97a72a3ef4b033e865fa7476003 SHA-256: 0efe5436fa4527be0bcd2864574dbd8b078b10dcf00ffdfacdef2c20fef1e35d
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, likely as part of a phishing or scam campaign. The document body text, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a deliberate attempt to redirect users. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute the malicious 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.com/pify?keyword=potential+and+kinetic+energy+review+questions+answers In PDF document text
    • http://files.rudysingh.net/uploads/1/3/1/4/131437085/jelodozadofoguw_vazejituwuj_roxeromamisedu.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/1/0430/7661/6353/files/mutasusagasozosibudejadol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5436/9690/files/6684815213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/diwosud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/18157361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/asco_guidelines_for_her2_testing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/73817942961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/3ds_emulator_android_bios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/advanced_engineering_mathematics_zill_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/ashrae_handbook_applications.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 1

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_off00007d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 5552 bytes
SHA-256: 9d14754fa0ec6ad31aeb29710557087866d0bf2f068effac82ff051360d6696c
font_01_sfnt_off00009023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9023 10076 bytes
SHA-256: bac944e1f81b22ae0ecffabaca09b91ab50823581851c3b78857507e52448191

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