Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3354bed4d00d441…

MALICIOUS

PDF

40.6 KB Created: 2020-11-04 09:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0e636657912dd5de0e103d784fccb4bb SHA-1: 9e097de2c21fcac2b196f6bd1aeccbea12c28f5e SHA-256: e3354bed4d00d44149fe63d9c6d5748157c14ebf99285d58dd43d3c8808c6fe5
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list, reinforcing the 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.
  • 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.club/123?keyword=annie+dvd+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5f9257757ac28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875c923385e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9e77c15bd47.pdfIn PDF document text
    • https://fumunagik.weebly.com/uploads/1/3/4/5/134520136/ed0f0a73.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/noromokubuti_rejinokusatopev_kozajaxufu.pdfIn PDF document text
    • https://vokujesezi.weebly.com/uploads/1/3/4/3/134306830/dapufidutuni_wenijozu.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/wulufo_bixibabujojek.pdfIn PDF document text
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/9269335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f89edeb7d223.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/4648840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f98bf5197f68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2d3824-4825-4c3a-87f3-3f7d20243a31/tare_hai_barati_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3860e8d9-710e-4316-b6a3-2f5a5db2c938/tivelumirorubasexafixudi.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_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 4504 bytes
SHA-256: bbb65582f38b1cf55f82d8fc69d6419707a9a392d923296b1f05b23a951281f4
font_01_sfnt_off000070d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 10932 bytes
SHA-256: 2d9de36b3f7f40e25a35a79d84b8cdf4ac32514b15e69ccbd262d598265b5a60

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