Malicious PDF — malware analysis report

Static analysis result for SHA-256 72656f1dfc69d33e…

MALICIOUS

PDF

68.9 KB Created: 2020-12-28 08:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad1f929024e20a264351ef01ffe5d88b SHA-1: dc6d27b2a70161b931efc969b220ebca1babced3 SHA-256: 72656f1dfc69d33e89bd794b0fd3d5d5fe83ccca77b90a34c57520354c852be2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to 'ggtraff.ru', which is flagged as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the primary function appears to be redirecting the user to a potentially harmful site.

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://ggtraff.ru/strik?utm_term=griswold+christmas+lights+meme
    • https://static.s123-cdn-static.com/uploads/4489981/normal_5fc42d68c3961.pdf
    • https://kuvenamowafave.weebly.com/uploads/1/3/1/3/131379608/5291153.pdf
    • https://cdn.sqhk.co/kolazapikib/Ura4fec/free_online_general_knowledge_quiz_uk.pdf
    • https://cdn.sqhk.co/kezixowog/iahejgh/hop_step_jump_anime.pdf
    • https://cdn.sqhk.co/zijikunu/jjhjiiY/dunefaxujata.pdf
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/f77408d143f.pdf
    • https://cdn.sqhk.co/bidomutarili/eojb5EL/nudopex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farefasejikap/47163299235.pdf
    • https://s3.amazonaws.com/retisovojor/tugilifore.pdf
    • https://s3.amazonaws.com/gateme/frog_dissection_post_lab_worksheet.pdf
    • https://s3.amazonaws.com/kasuwevovog/kenenunexagese.pdf
    • https://s3.amazonaws.com/tetazino/centralismo_definicion.pdf
    • https://s3.amazonaws.com/kozibowisenatu/sec_codification_of_financial_reporting_policies_602.pdf
    • https://s3.amazonaws.com/fosawef/portal_vein_thrombosis_anticoagulation_guidelines.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_off0000cb72.bin
c2096ff9cf0ce5641cbc446ae560ab44488716bf1d3bad803f20df4bc51c6210
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 5476 bytes
font_01_sfnt_off0000ddf7.bin
eff282676c9a8230ed3acd636592bf2edcf0a8990010c4067f2e960e23282f38
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 11876 bytes