Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf4943d288679b3…

MALICIOUS

PDF

41.9 KB Created: 2020-07-09 07:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b72eb1792a73a36bff8d1a147f89e9fd SHA-1: 9366b50e50c4aed94168b5559c7c8fd070c628a1 SHA-256: 8cf4943d288679b396c006f4ccf4aba96fa87d788d13c68eb738da5a6b86fde4
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects through 'ttraff.com', a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Greek mythology worksheets pdf'. The presence of a large number of external links and a malicious redirector indicates a likely attempt to drive traffic to malicious sites for phishing or malware distribution.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=greek%20mythology%20worksheets%20pdf In PDF document text
    • http://files.taimillwork.com/uploads/1/3/1/3/131380720/2378637.pdfIn PDF document text
    • http://files.jemskpropertyventuresinc.com/uploads/1/3/1/8/131857791/polusonev.pdfIn PDF document text
    • http://files.kohenproperties.com/uploads/1/3/1/8/131856308/taruxaxabij.pdfIn PDF document text
    • http://files.drawingonmusic.com/uploads/1/3/1/0/131070044/mupesibudunug-womexezaluzo.pdfIn PDF document text
    • http://files.mealtimematters.org/uploads/1/3/1/3/131379320/bepafalobajuwi.pdfIn PDF document text
    • http://files.rachaelgrasso.com/uploads/1/3/1/4/131407898/pobojovedu.pdfIn PDF document text
    • http://files.styersconcreteandconstruction.com/uploads/1/3/2/6/132680869/bujilenadodok.pdfIn PDF document text
    • http://files.writerunblocked.net/uploads/1/3/0/7/130775053/8983266.pdfIn PDF document text
    • http://files.international-mini-mba.org/uploads/1/3/2/3/132302928/8174390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://datefakifeba.files.wordpress.com/2020/06/mopudedopawefogan.pdfIn PDF document text
    • https://tobewuru.files.wordpress.com/2020/07/rodiwupelutuxilupe.pdfIn PDF document text
    • https://zexekiko.files.wordpress.com/2020/06/fiwunaw.pdfIn PDF document text
    • https://xekavesa.files.wordpress.com/2020/07/57414744109.pdfIn PDF document text
    • https://pobizabaj.files.wordpress.com/2020/06/vemev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.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 8

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_off00006667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6667 5168 bytes
SHA-256: 35c7b713e12fd1a09a2cfd7a653e6edf82a25d49ca10b13a81cc3b5066abe3e5
font_01_sfnt_off00007829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 10248 bytes
SHA-256: 93b4b76ff425164835d02e25de0e5dad636edd8d5e83b89df2715b975fea6b9f

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