Malicious PDF — malware analysis report

Static analysis result for SHA-256 48cdb9923573eb33…

MALICIOUS

PDF

48.9 KB Created: 2020-11-04 11:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 42e85397bd4ea316389c562c753d11d4 SHA-1: e4ec98ed252c9239ab468d1f18d50574e6221b18 SHA-256: 48cdb9923573eb33ae8166ca295d5a5858705ddb4a61a60a04f18a44098c0a89
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.link/123?keyword=gymnastics+tumbling+air+track, is identified as a malicious redirector. The document body also contains this URL, suggesting a lure to external malicious infrastructure. The presence of multiple disposable hosting links further supports a malicious intent, likely to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.link/123?keyword=gymnastics+tumbling+air+track In PDF document text
    • https://damitonamusu.weebly.com/uploads/1/3/4/3/134306925/redowikokanutefa.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/wideverirufopoguko.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/foxepiraf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5f9a3698e5f9f.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/vovadigofovexuneze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f92732a1f34f.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/duposikuziwoniziwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f951e004735f.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/1/0434/7622/2114/files/2020_subaru_ascent_limited_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9ec0b0-e897-4867-a4bf-1699d4142ca4/valawijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1623/0315/files/jewisomumexefalofanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d6ece5-ea80-444e-993c-4a3391761705/keeshond_samoyed_mix.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_off000080d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D0 5456 bytes
SHA-256: 603cb25c1e5650de6c33c887f9dbdf140592b1a83ef96dcd46e0f2e403a6f594
font_01_sfnt_off0000935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935C 10280 bytes
SHA-256: 3c39ce2efaa877690faf1f314a489a3d22d55d4dbe61968bf509db6c181ae181