Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17166e8d6cb858a…

MALICIOUS

PDF

40.1 KB Created: 2020-10-28 05:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 47482689b8bcd39df0b11951f7c26ec4 SHA-1: 1ea35079ada5283738a4056074f450a98228fa22 SHA-256: d17166e8d6cb858a630b3dae85c3a80769b504b48774fab132f8006403ad811b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or distribution network. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful 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://ggtraff.ru/strik?keyword=mopar+cold+air+intake+review In PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/zifoti-gafotin-zovizede-pinis.pdfIn PDF document text
    • https://gikigafe.weebly.com/uploads/1/3/4/4/134440869/8213900.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/d549da259ed0cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8fbc5c666dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f92559f8a22d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f9797a56cc80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f9263e1ae468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libosokune/metabolismo_bacterias.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/sociolinguistics_by_hudson_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/70602465513.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/warrant_officer_creed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/quality_control_in_histopathology_laboratory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/jutubixojujijakejap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833b4f2d-4d09-4237-8897-981df9ba4d3b/44226298368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c2a13b-f0d2-42f8-a674-9c07f221b592/losepimuzijoluxolirixifo.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_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5108 bytes
SHA-256: eba7437ded89c72a138ea0becada9fe10ce7f38a289169ca615fd7feab23a108
font_01_sfnt_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 10752 bytes
SHA-256: d1d99702126554337e76d3c36fe26aa6bc53b774530b2bc1432c35ba642aa516

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