Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bff4ca97b995f3…

MALICIOUS

PDF

75.9 KB Created: 2020-11-20 04:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2dc4c8c92fc9c4645ba6ac85d40a06d5 SHA-1: 1970865a55b7437eaca654886fff371adc97c922 SHA-256: 48bff4ca97b995f34d709f22d3a35f3b8ff21c5b8ef871d29bcc57c01d2a2d6e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL `https://gettraff.ru/123?utm_term=medical+practice+act+of+1985` is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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/123?utm_term=medical+practice+act+of+1985 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5fb5096ac982d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fb00b3bed9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_5fa9afd825114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f9897b2a6c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5f9716171552d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f8cb52eaf8ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f903fd7bccae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5faa3895d5f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f941899e5295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f90e44a15454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b50aef4-eacb-4fdd-8a3e-5083556ae1c6/bipewipabogivuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660e07c2-62dc-4ea3-a022-5dae03c4ba77/2146997254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09703353-25b1-4d9c-8526-78e55fa4f442/panasonic_sr-de103_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d417a1-93ba-4186-b40b-e360a37ffc2a/68561426453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa891a27-bc97-4af2-a6db-c1171e68b708/loxixemarate.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_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5500 bytes
SHA-256: 6a2cf565a41bf74e047a086cea255fb1f529475cb0280a35c82cf4506b5cc2c7
font_01_sfnt_off0000ff19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF19 10588 bytes
SHA-256: 8926bf3ab8424acc66d445b0418d259bf02507c9fac124be82317f39e01cd61a

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