Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa6b88a13ed757f…

MALICIOUS

PDF

93.3 KB Created: 2020-12-16 15:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 033aa88fd78c2dd386b40e9f4b13c3d8 SHA-1: 749daf7080bf7f20f567f8ebc51ac2032903f02e SHA-256: aaa6b88a13ed757f7fbacf3edbacd74785b04d2e16a644075e52b1d4cfa3671d
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at 'traffking.ru' and a link farm hosted on 'weebly.com'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=data+table+cheat+sheet In PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/jisif-rizegepowirevan-bosibolejo-waribusonu.pdfIn PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/zorogowepawoposupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/de959503-cddd-4599-a7e2-a25cc04c528b/79030706521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e295b6b-9afe-4683-bebd-a923d1ab9b0f/rexroth_flow_control_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/amira_nature_foods_ltd_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/kusipiselelawinova.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/rudixudebonujuluvisidox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2972eae-57de-419c-a91d-c2b80b898007/microsoft_points_code_generator_no_s.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/imvu_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02dd31d-a516-4c54-8d35-4bfdd1427e75/cpp_financial_aid.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/watch_birds_of_prey_free_online_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/60603429347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28df30b4-14fa-47e1-87c4-dc62b2b755ab/6737469453.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001251e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251E 4452 bytes
SHA-256: a1f2f1bd12586ab45f462f70867dacf710d6e63b5752089fb543f78ca86c6199
font_01_sfnt_off00013442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13442 11272 bytes
SHA-256: 1d138dc37b067772479dbd554441553c5fa0fcb046df0d1f42f84ad89a4a816d
font_02_sfnt_off00015a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A3F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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