Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c44c2fa00245e2a…

MALICIOUS

PDF

36.5 KB Created: 2020-09-20 12:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 022fdc416708c1fbafe4e37e7740b158 SHA-1: 19660fdf2c0629bca1c192ea450dc3cecab62456 SHA-256: 8c44c2fa00245e2a8b6555f80e8ceece91305099b38de88d89c0194b31cd09c8
184 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a job search for 'Shake Shack careers UK'. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=shake%20shack%20careers%20uk In PDF document text
    • http://files.nealpersoneus.com/uploads/1/3/0/7/130739498/1798032.pdfIn PDF document text
    • http://files.limadrivesdachurch.org/uploads/1/3/1/0/131070501/1610080.pdfIn PDF document text
    • http://files.thedivinesophia.com/uploads/1/3/1/4/131437210/3499799.pdfIn PDF document text
    • http://files.jacollierville.org/uploads/1/3/0/7/130739570/6664852.pdfIn PDF document text
    • http://wubuzu.enchantinteriors.com/uploads/1/3/2/3/132303001/8325065.pdfIn PDF document text
    • http://files.cranbrookdistrictteachersassociation.com/uploads/1/3/1/8/131871494/8c401b.pdfIn PDF document text
    • http://javed.patriotspointblendedlearning.com/uploads/1/3/1/4/131454035/3272026626f3.pdfIn PDF document text
    • http://lalexisam.jeannekipke.com/uploads/1/3/0/8/130874019/zuzojovawubebekasar.pdfIn PDF document text
    • http://nufuzopi.rmppublications.com/uploads/1/3/0/9/130969742/17d4b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2091a1b-3fe6-4490-8620-7b98025d8ee2.filesusr.com/ugd/430cb2_dc1078e48f7e42be8bed0969ea66c34d.pdf?index=trueIn PDF document text
    • https://fe23d71c-6314-47ba-87c8-c8766af93e55.filesusr.com/ugd/6f9b04_72e923d3635544849e0a278897e1a219.pdf?index=trueIn PDF document text
    • https://6dde3fb5-79dc-4302-b446-2f0329ebb4c1.filesusr.com/ugd/bf0735_11e047627e9c4b9dbbb5abef0c7b5b1d.pdf?index=trueIn PDF document text
    • https://56bb1b55-9863-499d-aee8-99df14acf1da.filesusr.com/ugd/a9248e_b57bcb05ba9346eb886a237b0c493b35.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/riluwogugosudede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/49263446453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/zefitedobojural.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_off00005036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5036 5024 bytes
SHA-256: 35461b36beb9d76c619aea709b32d7cb49b5254cf71914bcc50fe99ff5d4aed7
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 10540 bytes
SHA-256: 1c9fa78dc5bed51d0ceca0f4e5dd70280cd01976dc715b0bfc53105258c9d079

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