Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b09dbeccb22883a…

MALICIOUS

PDF

64.9 KB Created: 2020-12-21 03:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa4940c8f971ae9aeeb1cf104e34f542 SHA-1: dfa4f3c99d1b4ac4aefc903b3feaa9bd419a64df SHA-256: 3b09dbeccb22883ace1f7cb911670054961948085a33cd30f4c1b258fb75290c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://cctraff.ru/aws?utm_term=beach+buggy+racing+2++game, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of the file. Although no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a malicious site, likely for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=beach+buggy+racing+2++game
    • https://cdn-cms.f-static.net/uploads/4482413/normal_5fbf4a3a145d9.pdf
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fc5145246e2a.pdf
    • https://static.s123-cdn-static.com/uploads/4392652/normal_5fde57413cb5d.pdf
    • https://cdn-cms.f-static.net/uploads/4402717/normal_5f9eb55ce31f2.pdf
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fb8853f61aa6.pdf
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fd64c4ced948.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8a72e515962.pdf
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5faebd06862e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitirew/xidumakuxisavetotefado.pdf
    • https://s3.amazonaws.com/nawosineromigi/legend_of_zelda_nes_level_2_location.pdf
    • https://s3.amazonaws.com/saziwijaxodav/17643_platform_in_egmore.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c25e.bin
a05bbc631c9c67de5cc5f659275aae8f38cc0611e866a8352c81313104e5141b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25E 5424 bytes
font_01_sfnt_off0000d4ba.bin
310654168dc7e9607968b7237bdfdc7792227cc5c13e090c8e1722a160c9e5f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 10124 bytes

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