Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6df9bac2d571a8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 04:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6623983d067c38f19645e3474dcb0b03 SHA-1: 5d87dfc41229d297c5c9392823a88fb08ab95c93 SHA-256: fc6df9bac2d571a8f9ff5fb2e6a056ec674d90f28f367e9b946128c236fb0ee4
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=corpus+christi+school+brixton+uniform'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains hosting PDF files. The document body contains text related to school uniforms, likely a lure to encourage clicks on the malicious links. No scripts were extracted from this sample.

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.com/pify?keyword=corpus+christi+school+brixton+uniform In PDF document text
    • http://files.janiceandbud.com/uploads/1/3/0/8/130874652/38a1e.pdfIn PDF document text
    • http://files.welcomeinspections.com/uploads/1/3/0/7/130740442/347ecca.pdfIn PDF document text
    • http://files.ben-noble.com/uploads/1/3/2/7/132740350/xufakifutadonumoma.pdfIn PDF document text
    • http://ximis.integrativemassageworks.com/uploads/1/3/2/8/132814930/joginofuvotoka.pdfIn PDF document text
    • http://pikapo.alzheimersdiseasethebrand.com/uploads/1/3/0/7/130776326/kitit.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/1/0435/3032/2071/files/87809905683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/mufugoladoxamozirogisof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/tebivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/bufujexenorefuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/92824244386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/situginiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/98522498003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4712/files/kavifuzozakebuxeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/xujepugawatosofisawivupum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/white_rodgers_thermostat_manual_1f80-_361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/nenijijuxuturemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/dimukipomab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/fudamuzijimabojos.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_off00006000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 5156 bytes
SHA-256: 5476aab50ecc6b8278d6ecab7b9cdb8499d5578a64f4d12984298f1e05fb785c
font_01_sfnt_off00007160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 10292 bytes
SHA-256: 9fc894e0ec9fb00457e2406332a3fa5cd35928cb923c1f1c9905113ad3f8d170