Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a8c07588ec49be…

MALICIOUS

PDF

73.1 KB Created: 2020-12-29 19:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6c913c59a91d8fe564b442f44cb6d409 SHA-1: 3287e674748bd017bf79026b096f4949e377ba88 SHA-256: 57a8c07588ec49be5f35fa8a7b7ec953682b66305a03496e10b1c776bf73d4f6
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'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=supernatural+season+6+episode+15 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f91142b0f31a.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/NwDjhi0/piano_tiles_online_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421780/normal_5fb52f20036b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416144/normal_5fe3f2ff92760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5f90eca163900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5fe365434561c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fea1aa7bb2b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fce2bf09aa74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484618/normal_5fced500e48e3.pdfIn 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/b188176f-3f6e-4b0d-a75c-46f2eaedc2dd/frigidaire_dryer_code_e9e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9027e571-857f-4ce9-bcb1-2e5377153e68/tabla_de_coeficientes_de_dilatacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdac7677-e652-43e1-8cbd-8ab7f055c919/68005469569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8333e5aa-5888-41e3-9934-e5997ad9a9a0/lelibor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0e39ea-122e-464f-aacc-6d18bcba165b/el_cerrito_high_school_football.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/77730896845.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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5384 bytes
SHA-256: e8c963c5eaf42d18ea7acd0d6c6192e738bf912dc708ee00b530f92b75b8c8ba
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 10184 bytes
SHA-256: 4423b4f4fdbe749c72edc934904b5966d8711403d0c21e72a10b4ef4a5b652d3

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