Malicious PDF — malware analysis report

Static analysis result for SHA-256 6314d1d3e1ef8868…

MALICIOUS

PDF

75.4 KB Created: 2020-11-04 04:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9ed99f59d1b150396c7a57ef1a38fb96 SHA-1: d8181117beff5287f7a126136f67bc2b687c15cd SHA-256: 6314d1d3e1ef8868a3733714bb12df90c8079863bcc7b67f96c42e80f9fc2d9c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ggtraff.ru/strik?keyword=citation+machine+apa+7'. The document body, though heavily obfuscated, appears to contain text related to citation tools, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

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=citation+machine+apa+7 In PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/779273eaeee12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8709ee1c3dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8a88fa69765.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/9eb15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8ff0a4463cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_5f9572a97491f.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/wonoti/71272288855.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/24756313961.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/lasesoliwada.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/celiac_plexus_block.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/17206933298.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/the_weeknd_album_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/stalingrad_antony_beevor.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/anatomy_of_a_horse_head.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_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 4852 bytes
SHA-256: 610d561c8e88d3789927ef615bcdc0e9f58377e32deff0271668308a4dfe167a
font_01_sfnt_off0000fa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 11316 bytes
SHA-256: f070057ff699b8b5bb3fec51f468e8bb5101c926211821db1464f6cb330534c5

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