Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f218add2100e1e…

MALICIOUS

PDF

66.4 KB Created: 2020-12-02 23:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 970d11b88eda0addab2bf94312fcd80a SHA-1: 5707fd6e02285febcbb141732da2a5bb3f64ab0a SHA-256: e4f218add2100e1e624dc7ff3819a420fe7c18f36bad295133982d24b0113584
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing site or a download for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffine.ru/123?utm_term=the+brothers+karamazov+best+translation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_5fbbdba594f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fa0e62f7b4c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5fc7d26974ec8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc293fe0b6b03258f403ad0/t/5fc52f3bf3de5e49b50ca7f1/1606758206156/74677060522.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3486312facd59cebc5192/t/5fc3e1069ee0f32b87cabf7a/1606672647166/zisujat.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/baofeng_uv_5r_manual_em_portugues.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5af41a3bf4b14abc9db24/t/5fc79affc953717e09de0ee3/1606916865741/52396191513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3584c32-7165-4130-9db4-77ca51d3d8d0/strike_force_heroes_2_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/captain_america_civil_war_screenplay.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/79970309637.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_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5188 bytes
SHA-256: 760fa647eadc89a36328f84e53b03b027cc99979c334b088c8511f0f82882c0f
font_01_sfnt_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 10112 bytes
SHA-256: 1fa5851810b10b4ff16b852d8288043ba7479b16c8a117d5f8522b1d09dd385c