Malicious PDF — malware analysis report

Static analysis result for SHA-256 4662510a51d6995a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 16:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c1482bb74925ea6e13f9c8f6dcaa41a SHA-1: ecd42aa2c23a497e593c7025a6ffa66f20f572d2 SHA-256: 4662510a51d6995a5915b3deed8f7c6dafa1b4c1b3cfcc3d5816fedbd1f3a85d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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=antenna+theory+analysis+and+design+balanis+pdf In PDF document text
    • http://files.yourpassionategroomer.com/uploads/1/3/1/6/131606346/3709074.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/1/0433/4249/5895/files/72553961289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/gewinetupuporu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/my_mic_isn_t_working_on_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/cutnell_and_johnson_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/51054428398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9358/0181/files/vapour_absorption_refrigeration_system_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/69605477534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/nodebagadinazelilajibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/13542283525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/babed.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 2

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_off00006336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 5532 bytes
SHA-256: 415a432450a021983bdf035a0e41b87a54874c74ff781cef89d221ddc3833714
font_01_sfnt_off00007600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 11536 bytes
SHA-256: 0c24f652fd2af3a0ceb64de0ee73b12c7ede38d1f6cb6d01b6fc993bc90453ac

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