Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3511f2b2024e54…

MALICIOUS

PDF

39.2 KB Created: 2020-08-15 02:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1607420919f914d86107a7efa79e0979 SHA-1: 0e261e7bcf7b211bf71eacfb6cc1eef24944b0ff SHA-256: 3c3511f2b2024e54714ffeb478a64f8460097abaf6c879ccf993a82fd33b5469
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a link farm or SEO poisoning attack designed to distribute further malicious content or manipulate search results. The ML classifier strongly supports the malicious nature of this PDF.

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=fractions+to+decimals+worksheets+grade+5 In PDF document text
    • http://files.nicoleedwardsauthor.com/uploads/1/3/1/6/131637056/bibogagip_vobinitinaju_fejifan_soretifela.pdfIn PDF document text
    • http://files.splendidsuns.com/uploads/1/3/0/8/130813357/8682801.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/1/0432/8259/6004/files/gopojejopabejitabuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/tatifikuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/rovetewijupabefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/59557888529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5637/9557/files/bunnicula_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/kenyan_form_2_biology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/nudit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/clinical_chemistry_principles_techniques_and_correlations_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/bukegisibemoguzifiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/26475559259.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 7

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_off00005aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAB 5588 bytes
SHA-256: 1d41cefb84962efa2f82d6d89440f0291ecda7190b5dc499cfdccda0da39418f
font_01_sfnt_off00006d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8E 10212 bytes
SHA-256: 0b2e286316cf5cba0cebe05592ef38d4901a5efd6075d75a2346c37e7f210a1a

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