Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72fcd6c6cafe31e…

MALICIOUS

PDF

67.2 KB Created: 2020-11-24 17:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b75cc83206061cfceb66fb3bc4cfc5fc SHA-1: d70c584703a391078212060efc9533a38dbc45ea SHA-256: d72fcd6c6cafe31eeb1b37db7941667b5ba490d73a86d715871f35324a1fcdd1
214 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, and it contains multiple embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=growing+in+grace+and+knowledge'. Another heuristic flags it as a PDF link farm with numerous external links, suggesting an attempt to distribute malware or conduct phishing. No scripts were extracted, but the presence of malicious links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=growing+in+grace+and+knowledge
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5f911136df0b3.pdf
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f91a0b64ee5a.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f93d7c5d5c02.pdf
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8728b437e1e.pdf
    • https://vuduleputasi.weebly.com/uploads/1/3/4/4/134488699/979680.pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f9484d069fb0.pdf
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5f9cac5b03ed2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zamuriza/45610094851.pdf
    • https://uploads.strikinglycdn.com/files/94d4382f-1d48-481c-b280-2a5c47be5287/tidebuvomodepaju.pdf
    • https://uploads.strikinglycdn.com/files/224e8fe1-fec5-4c94-a096-77b3367f63cb/pejibebimedizeduzutuw.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_off0000c7ca.bin
1e97471ea38ae78930a8edb7f933619a34ec86e2ee1dab0f27a81bfff6b505c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 5116 bytes
font_01_sfnt_off0000d95e.bin
f37480f718ebdd53b7dcbcc9b3d951e88466d4728a8869db2d97d63955aa50e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 11756 bytes