Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1276635275e95…

MALICIOUS

PDF

65.3 KB Created: 2020-12-21 01:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 05328eaff3bac47b531f402f7cf69843 SHA-1: 2d8b7d850f82d80582ebc8f65fa40f784ad6a533 SHA-256: 0fb1276635275e95e23f5ddb490b9a8b80f0b8936fd235d303eb5e36557b2905
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. This URL is likely used to lure users to a malicious site. The ML classifier also flagged this PDF with high confidence, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=2019+telugu+calendar+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fdb5ccada242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5fc77c023392f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_5fa49113396ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5f9bc32b1a372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_5fbc5fdb1d1db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f8fa288ba999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fc3f8551f2ff.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/mojivikapeti/xaboremexujowulejuwof.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/xipamise.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/land_and_sea_market.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/batedurosur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fcd4d8c3650128350c97/t/5fc8fa638ae58f63939123b9/1607006820732/bbc_news_tik_tok_video.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_off0000c32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32E 5532 bytes
SHA-256: 0b28aad647bed435a8e7a5d8c0ffeb85185527bf475d7a08ffbe26caaf126e59
font_01_sfnt_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 10092 bytes
SHA-256: fbc97db315f0837eae880865330b60d78a690d37fb337f668842ef9df231fdaf