Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d5a14f306bf26c…

MALICIOUS

PDF

41.6 KB Created: 2020-11-02 03:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7c112c42bf0d031ae5bc81d171e43f80 SHA-1: 5f7fd3f48d54ebcfedc6beccb38436bbd403b0be SHA-256: f3d5a14f306bf26ce1609f6f5d361a3fd62c8eed3915a9d066bb80d44fec1bb8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ggtraff.ru/aws?keyword=instant+damage+potion, is identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates the document is part of a link farm, suggesting a broader campaign to drive traffic to malicious sites. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to lead users to 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/aws?keyword=instant+damage+potion In 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/1/0500/9807/7891/files/31984919330.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/the_woods_coffee_bellingham.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/10018866897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8004bdff-15f9-4819-a1e0-cf3d8d325ee8/5538683747.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/sovirupazot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12bcf39-4ffa-457a-a5fd-6d0a7bfe5885/34922234995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d3d1cb-7533-4097-8aa7-86cc455ca219/remimavukox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1530/3863/files/36072171423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0487/5701/files/18637630322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1b3999-e4ee-44ff-9360-a346c4900ab8/zogubew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c6bb81-19b2-4815-bd70-ef5abe562a79/95931012059.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/84200318840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5004/5092/files/hall_of_bulls_artist.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_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 5088 bytes
SHA-256: 6d03421fef6a4b6a36d333da60dfa52d49ade7736dad12bf059e66996ee25a39
font_01_sfnt_off000074ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 10932 bytes
SHA-256: 4ed7743a53d19e1a6d50823d063fb0f5e451a8ec0969cfbff5debb8b7d866903

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