Malicious PDF — malware analysis report

Static analysis result for SHA-256 1955a4ccd18ce093…

MALICIOUS

PDF

38.4 KB Created: 2020-08-26 14:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8bf8be7a33024e012f8b108f89c83b11 SHA-1: 3b07ffb7e5f7e9498c6f2e43b688f27e7cd0de41 SHA-256: 1955a4ccd18ce093312471f336a2c6269fe0d484c2f8197ddc99f390dea89a73
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as an educational worksheet, but the primary link redirects to a known malicious redirector infrastructure. This indicates a phishing or scam attempt, likely to lead the user to a compromised site or download further malware. 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.ru/pify?keyword=interval+notation+worksheet+algebra+1 In PDF document text
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdfIn PDF document text
    • http://xazidelug.preppantherplace.com/uploads/1/3/2/3/132302868/1542293.pdfIn PDF document text
    • http://pogediw.tamara-vasquez.com/uploads/1/3/0/7/130776089/3befbb40ebea59.pdfIn PDF document text
    • http://gobekajo.christinabhoward.org/uploads/1/3/0/8/130814328/bogexekowelojiw.pdfIn PDF document text
    • http://wozir.nomadsadventurequest.com/uploads/1/3/0/7/130775726/9193639.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/1/0428/9835/8432/files/41448402009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/palijogisenuzejovuveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/future_maker_products_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/36246988147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/97542919928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/30810774135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/solving_equations_worksheet_gcse_higher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7868/8663/files/wifumoxawiganewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/tuximabipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/bekasidofak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/xulizibipolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/que_es_una_cadena_alimentaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/30555835327.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000527d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527D 5292 bytes
SHA-256: 5b6d1cc3d7a356e1074523fd7e6ec885e67cad4176c58ce9768064b3ddd66705
font_01_sfnt_off0000648c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 12312 bytes
SHA-256: 0296b45827c7cb9eb6ad8fff732bbbc362b9595c7cc4b88ca27fb7b52811041d