Malicious PDF — malware analysis report

Static analysis result for SHA-256 260a7daaa6f0c2a5…

MALICIOUS

PDF

41.2 KB Created: 2020-10-09 09:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 163862dc65592f12bfc4f529cfd420e0 SHA-1: e8689569a199ce952b2170af4f1c4590ff683f0e SHA-256: 260a7daaa6f0c2a521a5b405865ffb0ef5d13e372cd6122dbf37c7c15b13a71f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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/strik?keyword=jean+paul+sartre+essays+in+existentialism+pdf In PDF document text
    • http://tafiw.carpetcleaningbyjeff.com/uploads/1/3/1/3/131380591/5995846.pdfIn PDF document text
    • http://files.messyhandshappyhearts.com/uploads/1/3/0/8/130874067/jonasevorut.pdfIn PDF document text
    • http://bodosobiw.crystalscrystalsks.com/uploads/1/3/0/7/130739916/rizunowa.pdfIn PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/78891483777.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/tevugofuvovititifiwi.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/2968670463.pdfIn PDF document text
    • https://site-1043876.mozfiles.com/files/1043876/52722741992.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/dewiroruzagezizatolelofoj.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/1/0437/6874/2040/files/dutch_treat_strain_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/standard_form_slope_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7227/3566/files/32760762198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/zapizij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/66659755814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4786/4478/files/95578210587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/32667674148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/subaru_outback_2016_manual_review.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_off00006479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 5348 bytes
SHA-256: d71ccb1ae12fc771f85532019d0ee41d26246cd448091ccd100c3081443be200
font_01_sfnt_off000076a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A4 9768 bytes
SHA-256: 084f7abf15d0af108ad493547b99ae5a1883b0bb5caad705813464968f82a534

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