Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdee5f6f3d1e7f0c…

MALICIOUS

PDF

45.3 KB Created: 2020-09-10 01:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ebe6f8f7215e53f31018a20da6a7b7a SHA-1: a0b160bdf6e3399905574c999459f1700f402a6f SHA-256: fdee5f6f3d1e7f0c68c670ceb1bd81dc9328482a31277491ec6691299bc56451
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary link, disguised as an algebra worksheet answer key, leads to a malicious redirector. This indicates a phishing or social engineering attack aimed at directing users to malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

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.link/wix?keyword=algebra+2+factoring+polynomials+worksheet+answer+key In PDF document text
    • http://kizokaz.supervillesovak.com/uploads/1/3/1/4/131437736/pajufosirovomofuwo.pdfIn PDF document text
    • http://files.barkingpreschool.com/uploads/1/3/0/7/130738852/zuziz.pdfIn PDF document text
    • http://files.jennayvonne.com/uploads/1/3/2/7/132740488/rezedufisoraxob.pdfIn PDF document text
    • http://nirofemav.delightthyself.com/uploads/1/3/1/3/131397997/gukogakapezagapadix.pdfIn PDF document text
    • http://files.swazisafe.org/uploads/1/3/0/9/130969645/lanuful_juvotugos_dunusariwodar_gosumekajetur.pdfIn PDF document text
    • http://files.sincitytees.com/uploads/1/3/1/3/131379014/00855a7dcf12ba.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/1/0432/3295/2477/files/87744750388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/xalajuvategit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7357/files/wesagizogix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/katavalegekolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/dusemiziwoguta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/online_hsc_marksheet_maharashtra_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/brahmo_samaj_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7264/files/customer_feedback_report_meaning.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 6

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_off00007222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7222 5948 bytes
SHA-256: 865e0e3b3cc0db72f6d295e14238f3a4025fad3adf29c95ca5a5db49a79a5dc2
font_01_sfnt_off0000865a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865A 9780 bytes
SHA-256: dacfed9667f8df1f411a3f8443192262d07cf1906910cda162a8b6f5d421ab6a

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