Malicious PDF — malware analysis report

Static analysis result for SHA-256 962dda5298f05b43…

MALICIOUS

PDF

75.3 KB Created: 2020-12-29 10:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 61e7c6d3863f04bfcdce6ebddc08ee83 SHA-1: 19845f0bfd47d5cf87e45d6edfd7dbb240a6228a SHA-256: 962dda5298f05b435a2a26d8a1688aa052e56741455a9cc7666facb48aefb13e
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with critical heuristics indicating it's a malicious redirector and part of a link farm. The primary malicious URL identified is 'https://gettraff.ru/123?utm_term=breeding+dubia+roach+temperature'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=breeding+dubia+roach+temperature In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5fc6bff145836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f9bb66798834.pdfIn PDF document text
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/2be7a.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/2543267.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/bebikelovinu_wepos.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/wujesivude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5fccbc6a93081.pdfIn PDF document text
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/67afd9d70b.pdfIn PDF document text
    • https://gemamiji.weebly.com/uploads/1/3/4/3/134372226/bisajiwa-tavijisifuwifo-xapovogojoja-belamilolinuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5fa8174375399.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/kavitokolezub/92288471617.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/jrcalc_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/how_to_make_spreadsheet_read_only_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/aaii_stock_superstars_report_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/juzufi.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/72034313168.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_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 5464 bytes
SHA-256: f0f50f5999c9f9cb51d7de084f58637affe02b4222ab47860f61708256d4877f
font_01_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 10396 bytes
SHA-256: 1637170c40471fc90932e059e1a16b5e1e062c810f986f470d073897fa616a6a

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