Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb2751b5a905e0e…

MALICIOUS

PDF

41.8 KB Created: 2020-09-19 07:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea91b2ba8fba3fb4bda181e3e847ed6f SHA-1: 0c52c3341f68c167296dee7cf0ddf94b63f0db1c SHA-256: eeb2751b5a905e0e9debf50f86bb03c4753a1a37201640e3a7a25b298ba5a401
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.me/wix?keyword=theme+of+the+most+dangerous+game+by+richard+connell. This indicates a social engineering attack aiming to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.me/wix?keyword=theme+of+the+most+dangerous+game+by+richard+connell
    • https://552fd390-0a68-4277-83d3-c805036ed07f.filesusr.com/ugd/9c58c5_b97ba1c564c94d1ca9ec91f5dd68f522.pdf?index=true
    • https://08568222-9f4a-4d94-b630-9ea7a6dd4fcd.filesusr.com/ugd/66c878_242a95e3ce7c43d8becef3eac2ca6dc2.pdf?index=true
    • https://d1960657-d0e0-4892-846e-0b80fee88d21.filesusr.com/ugd/b14caa_91f2f9cb49a24d85a31a43dac2603d17.pdf?index=true
    • https://11fbc8a0-833e-489e-9f24-021c79f3c15f.filesusr.com/ugd/5e5b2a_1c72d26ada9541e2b8075b4d7c74e2ff.pdf?index=true
    • https://37a641db-6a82-403d-8a4d-77234c5711aa.filesusr.com/ugd/73cb9e_52416c9bf6cc495dbbcd7d3d583da12c.pdf?index=true
    • https://4b739e3b-5f99-4a34-8d38-5ec573d42a48.filesusr.com/ugd/9117e0_49370727a0b44a2d86ab71a3aa4e421b.pdf?index=true
    • https://0f2c131f-68f2-4f96-92bb-a4e796fe00ac.filesusr.com/ugd/9ef1ea_fee32ced19ad461d8a733afd00be7b1f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/92711030501.pdf
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/sheetz_daycare_claysburg_pa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646a.bin
dc9aca77177de3288f7c6e35962919f7a24a2f1dd24d2ed7c3cdd2ebb79a8740
pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5628 bytes
font_01_sfnt_off0000776b.bin
e52af753022e723063f960ae07bf5d2e3980655457502f78146df6c91afe65de
pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 10288 bytes