Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dac18a10aaeb593…

MALICIOUS

PDF

71.7 KB Created: 2020-12-26 22:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 789aa6d6663b0f22fc50fead754df6c3 SHA-1: d543693cf43eb06d23d7bb1cab95d0316e0e6d5c SHA-256: 1dac18a10aaeb593ee9f88dbdd5a69336c3f3762a6ae4008f28872cf69a9bfd8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at `traffking.ru`. The document body, though heavily obfuscated, suggests a lure related to 'jazz free internet code 2019'. The presence of multiple external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the overall structure and link analysis point to a phishing or malware distribution attempt.

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/strik?utm_term=jazz+free+internet+code+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5faee45650441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f87cd8e7bab9.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/kunutapabibopik.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/iCEGjj8/infinite_looper_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fc8bb928251d.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/cMyihij/88715156781.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/b8iXghK/358_squadron_1945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5fe2fc502731c.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/dbd25dc2.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/fhjghhd/disosezusax.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/7dc6efab-f497-4d31-bafe-c11154696f93/zimafepovirap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285a19d1-ffe4-4e1a-9720-63b404884706/liberty_benton_high_school_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b72f844-ef49-40c8-b23b-08fc44642927/42774338450.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_off0000ce0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0C 5116 bytes
SHA-256: a5cff5a8ebdabb6261ceabec5c4897c1479c34a4408cf38d0f91e62388c3801e
font_01_sfnt_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 10732 bytes
SHA-256: 11004e741ea0c40269cfd0a8f8a4411586361a2990b8a3d2882a855e655e1329
font_02_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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