Malicious PDF — malware analysis report

Static analysis result for SHA-256 2677f807ce3e86dd…

MALICIOUS

PDF

38.3 KB Created: 2020-10-11 11:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b17cf378f7a321095e371b433aba3426 SHA-1: 60e3f4936a335f92e8c19bf2f68648bde975e26e SHA-256: 2677f807ce3e86ddd67c609d027ec8b6d10cc349fcdf72bc32b4e78c642bc9ed
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'gettraff.ru'. The document body, though heavily obfuscated, contains text related to a worksheet and includes the malicious URL. The presence of numerous external PDF links, many pointing to 'strikinglycdn.com', suggests a link farm or SEO manipulation tactic to distribute 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/pify?keyword=write+the+equation+of+a+line+in+slope+intercept+form+worksheet In PDF document text
    • http://watijike.ontrackracing.com.au/uploads/1/3/1/8/131871921/zurobax.pdfIn PDF document text
    • http://files.abundancewellnesscenter.com/uploads/1/3/1/8/131856195/kuxis.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/tinalevixufarawopuj.pdfIn PDF document text
    • https://site-1038806.mozfiles.com/files/1038806/7703849895.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/gesefivelala.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/c6e1354c-cfc2-4ccd-811b-4558c6f885ee/52114280895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929015ee-8d75-480b-99e8-34bdc48770fa/nepewuvivigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c70e5e1-8bae-4c9d-96b8-1e398f0d90d9/23048398023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b749019-1cfc-4150-bbf9-6568b8c06169/vutokaninuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9477702-3e9a-4c3a-a99d-05aea2ee6d49/82247730419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e209dbf-3e5a-45be-a9cf-2d7a710621e5/62803244440.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7F 1820 bytes
SHA-256: 34f78d6ac2b1cdceba250a3e04e7eb4c8ba201109a69c79ec2405d634ef2c12a
font_01_sfnt_off00005808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 5552 bytes
SHA-256: 82707b8c24147186f293e506f094538e3208fd05c8763032f849dd937ebf1dd0
font_02_sfnt_off00006add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADD 9732 bytes
SHA-256: 07fb7683678e766f4bc84a53ac8a792ea67a2741ee06501eb294d398129709ca

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