Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b8a22118315b7b…

MALICIOUS

PDF

67.2 KB Created: 2020-12-17 01:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: df0769ca3c4653640f581e51fefbadcf SHA-1: 9cbdf19b608ac978ffcf1c8850c38b55d0a08b2c SHA-256: a6b8a22118315b7b15a5a554cd18795769bc6bb82f422f012e252d1e509e0890
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 'traffking.ru'. Additionally, a machine learning classifier and ClamAV both flagged the file as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URL is likely used to deliver a malicious payload or phish for credentials.

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://traffking.ru/aws?utm_term=nes+emulator+apkhere In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb65f96006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_5fc062f71fe2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5fac19bfa92c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5f9da1841b1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_5fb9412429784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5fbc902ebb95d.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/5fc0bcfb2e537a05ef083615/t/5fc102dd18e72e5fdbfb32f3/1606484702513/siward_macbeth_pronunciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb1898b-8aa6-4bac-a7e9-1653e2e7a131/kyusho_jitsu_espaol_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/borges_library_of_babel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5813c274-6976-4006-850e-3d3349241f17/wekezomefatonajolakam.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/consumer_reports_best_all_weather_tires_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36b9bcd1e280355e43c7b/t/5fc8bd386031f4738626f643/1606991163545/87787328388.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_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 5092 bytes
SHA-256: c09651cc76f17711d14680aa522cfb89815b73eba56c76eab7c41cf27fdf994b
font_01_sfnt_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 11108 bytes
SHA-256: 36d0d18abfae3dff8cbab09b8e9e07852d9da0483a39f6c938e2f556a3cd8906

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