Malicious PDF — malware analysis report

Static analysis result for SHA-256 2950e5a64a02626e…

MALICIOUS

PDF

72.5 KB Created: 2020-12-02 12:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6db5c0a9ecfccfbb265a349642cb9df SHA-1: 57f9df1c60512642e47d34fdb48e8572ab899658 SHA-256: 2950e5a64a02626ec5ec8b3e4bbdfb264f20114a5b52d6c2e82ce7a6ea90f78c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for "IMVU credits hack download 2020". The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=imvu+credits+hack+download+2020
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5fa6b038b19f2.pdf
    • https://cdn-cms.f-static.net/uploads/4465386/normal_5fbd31e355c41.pdf
    • https://cdn-cms.f-static.net/uploads/4406241/normal_5f9264f879dc9.pdf
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fa629a37c25b.pdf
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5fac3e0cd508d.pdf
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fa2cfff1c6af.pdf
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f955ab0c1464.pdf
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5f8f54655ceda.pdf
    • https://lajojadarexod.weebly.com/uploads/1/3/4/5/134506383/cb685.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9227132.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03361149-f9e3-4b3f-8f88-1f62fd427a66/8481148269.pdf
    • https://uploads.strikinglycdn.com/files/98319513-bdc5-41d3-a15c-a5bdd37c028c/gizosuzasotezeganozapuzal.pdf
    • https://s3.amazonaws.com/pevarijidasalop/94296813213.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_off0000dcd5.bin
1d4d77ddafdcca62dd7f7458540064f8ffa13ef8138fb5a3962bfccc4371af27
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 5604 bytes
font_01_sfnt_off0000efcc.bin
0caa8b679cac3cbff5fc078b1ed0d6a381cc90336d62d0a3ea8e800f5cf4fa0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 10976 bytes