Malicious PDF — malware analysis report

Static analysis result for SHA-256 8687be5f2c3e4898…

MALICIOUS

PDF

68.8 KB Created: 2020-11-19 07:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b8f531b53a41ad43e2535a2b958fe4d9 SHA-1: 9f8bc1d88d655022a6059475ee44e09761204192 SHA-256: 8687be5f2c3e48981ed20fabebfdf26e3294b6bd3316683c475c398614a67e59
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely intended to lead the user to a phishing or malware distribution site, disguised as a ROM hack download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=nes+rom+hacks+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_5fa6fb17563ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5fb29eaa8423b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fa74ed721f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_5fabc433481fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f8843aacc07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_5fb51b8a288d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5f8f2cc5b0c4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xatojem/xedajotisabam.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/sixikafurojukulatof.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/lesson_7.1_practice_b_algebra_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/focus_on_form_focus_on_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/buchholz_relay_function.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/fesufenigabuxi.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_off0000d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 5304 bytes
SHA-256: d76cfbb06ecee4fdfe379380f5e98c89c306bc4489d79cbfadb10f3727e54266
font_01_sfnt_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 10280 bytes
SHA-256: d7da46b9b2aaee507925f8bf47bcc3e87ba44e1c54878ec7aef6e893d0883438