Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a50009cd1313f08…

MALICIOUS

PDF

67.7 KB Created: 2020-12-04 07:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 731804985803eafec075aab1e11a2c73 SHA-1: 79384e65f252ab6ba344392ccf12a50036842367 SHA-256: 8a50009cd1313f088e8586dc947c2804d5377db1774d46c962cd4db2fd74122e
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, specifically pointing to 'https://cctraff.ru/aws?utm_term=axl+movie++in+tamil'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the PDF and the malicious URL suggest it's designed to lure users to a compromised site, likely for phishing or to download further malicious content.

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://cctraff.ru/aws?utm_term=axl+movie++in+tamil In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_5f99b305da18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5fbcf16751aa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fc3e2631cb9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fb2ae9434dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fb288dfb8dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f87afc6ab7d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5fa83b8e0946d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_5f983f19ab8c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f884e6ce48db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f9d18fbae1bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1c42b085bf90c0e0336d5/t/5fc94163db7ea931cce1e53e/1607024996824/62236032610.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01425c6d96458361db408/t/5fc13d23eaf37e3b64c94821/1606499619900/bufofer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65d93485235c86be6acd/1606378970693/bad_education_2004_full_movie_english_subtitles.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_off0000cbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCA 4672 bytes
SHA-256: 7bbda0fc134839ed0a086c6fb34544cb39b30284065a0fc02668d1e79906e38d
font_01_sfnt_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 11368 bytes
SHA-256: 041b7e40d2b799b2ac6ff29d2e5948e733a5326ff6b226f3bacceec2237929af

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