Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ceb54a5f8c6f912…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 07:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e882f5a9062bfb4e39cc60f0c8ffbd SHA-1: 85ecc44acc38588760165aaa0cf27ff16b19ff4e SHA-256: 5ceb54a5f8c6f9129460503f78626cb8118f14a38c2a67dff64fc1f09c8964e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to potentially malicious or unknown domains, including a critical redirector link to 'ttraff.com'. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution.

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.com/pify?keyword=alone+movie+video+song++hd
    • http://files.kulmschool.com/uploads/1/3/1/6/131606011/sazog-mafaso-larur-lilizubed.pdf
    • http://files.grizzlygrover.com/uploads/1/3/1/4/131407089/fozetole.pdf
    • http://files.kingdommassage.net/uploads/1/3/1/4/131407178/bisini_sebib_xopugoxedega.pdf
    • http://files.makeup-design.net/uploads/1/3/1/6/131637658/4930563.pdf
    • http://files.joseixchu-realestate.com/uploads/1/3/1/4/131454373/maladix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/blueparrott_b250_xt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/luzatitex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/68351183061.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/livro_calvinismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/41636320870.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/73391767254.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/41700107529.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/marist_college_emerald_formal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/51687737814.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/apc_back-_ups_550_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/zijarupukitonadezu.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_off00005aa9.bin
c56d1eea6435020ffe2c25d56cf00985df5477e38cb7b60a4301bc33bd403302
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 4980 bytes
font_01_sfnt_off00006b7a.bin
f6a39d14d9e7986ebb04b05613f4b6796b450733bc792a629615bd0cbe5b4b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7A 13024 bytes