Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f229a70aa7141b5…

MALICIOUS

PDF

45.8 KB Created: 2020-11-03 04:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 07e8fd78d1909c4930b795a81566b8a2 SHA-1: 18e4a387d719d1f24211716f4cbf7aa1ee6a40ff SHA-256: 7f229a70aa7141b5985188aec809110c6a9679b4cce77983c97af38185759434
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though partially corrupted, contains text related to 'memory loss disorders' and a URL that is likely intended to deceive the user into clicking it. The presence of numerous external PDF links suggests an attempt to create a link farm or distribute further malicious 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 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.
  • 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://gettraff.ru/123?keyword=types+of+memory+loss+disorders In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_5f9f742312fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5f97c543b84f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f991c2c8b775.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/1/0506/8370/7569/files/first_law_of_motion_worksheet_and_answers_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1138/3711/files/kepugujaxigematudabegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/cara_membuka_microsoft_excel_macro_enabled_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f8cfee-18fc-4cd4-8e73-9c469b3af979/limbaugh_funeral_home_portland_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d1937e-d0d6-484d-a1f0-1d885b1a14b2/78773222073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda27f0a-2e34-4ef5-8c5c-3a25ac1cd061/76245248661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a96d026-7ff2-4683-ba8d-9e0da8f79d2f/tiniwaxezotagiguludi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141db4fa-ac06-4c66-922d-e3bc190abd99/61360074927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2929/8852/files/the_dead_zone_series_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a50187-8aff-42a0-9acd-308f2c830f66/protocolo_test_persona_bajo_la_lluvi.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_off0000768e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 5028 bytes
SHA-256: f385f03ff53dff43c015d575faf7c1d171a1c8c611ea892baffe3816959eed24
font_01_sfnt_off0000879d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879D 10092 bytes
SHA-256: 09fbf118aa23b132128eaa6cecbe2887108ae1810148c1936e836ab012fef67c

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