Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9ac0a05adc6f5f…

MALICIOUS

PDF

40.5 KB Created: 2020-11-06 20:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6e5315918db39f7ae4ebbf66bc07796a SHA-1: 1dce90b32782db25f5a126ff0180d9744db0f548 SHA-256: 0e9ac0a05adc6f5f80b1fa3d842252d6dfd3cb5a27ccf4af30d02090d411b09b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://trafftec.ru/123?keyword=big+summer+blowout+frozen+scene, is directly embedded and likely serves as the primary lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=big+summer+blowout+frozen+scene PDF link annotation
    • https://tewifevorifoja.weebly.com/uploads/1/3/4/3/134387655/63b0f83.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/bf39f60ee.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/4233887.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/aa10ce47-ffe9-440e-9159-921aa4eccabe/12043093661.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/49628536240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9770218f-9f19-4faa-bd9e-b18811b9f589/crafting_and_executing_strategy_19th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fca2d3-ae8d-403a-8862-f597ebe9db59/13905919653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41436c6-3e9d-4811-8003-d346cf2a41b5/fonewetuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fe52ad-71b7-4661-88c4-900684b52aa1/nordictrack_commercial_1300.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/24280951963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193afa8f-5859-445b-a240-92c5ba21778c/otis_michigan_offender_search_female.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_off00005e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5324 bytes
SHA-256: 4ec9edd0b67e6f48324e66082bfb4d9810b940dc9377b9514a0952c2bbde54a4
font_01_sfnt_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 11112 bytes
SHA-256: 106715bdb16b31ce2aa24b9e716da150bedd6bad84fb95a77a628c14fcc4456b