Malicious PDF — malware analysis report

Static analysis result for SHA-256 12deff951c0ed3a4…

MALICIOUS

PDF

34.8 KB Created: 2020-08-18 20:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc02828dc34227b194becc2db69e5a58 SHA-1: 3513a3895bd2f240376eee91d6fe39d625ab528c SHA-256: 12deff951c0ed3a4c6b88311c77bd16f05494c3e9970aac1ba56663ee4ab2c4d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware delivery. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

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=direito+penal+bitencourt+parte+geral+pdf
    • http://nuxidawog.astepaheadgroup.org/uploads/1/3/2/6/132695569/dufiludid.pdf
    • http://files.continuumsofservice.org/uploads/1/3/1/6/131637224/povaben.pdf
    • http://files.anptech.net/uploads/1/3/2/6/132682936/5b3b866.pdf
    • http://files.juliakur.com/uploads/1/3/2/7/132710786/vekemeferonetukawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/72704536067.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/katojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/xaziximiremogafubul.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0407/files/55577315624.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/poronaxudiwemasalurepin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/warriors_yellowfang_s_secret.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/94013704170.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/microscopio_optico.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/python_mutual_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/33180119276.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_off0000484c.bin
07569b75fbfe63085fda3e34884e5591ca1bfc6fbb5060c33927b646718e18ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x484C 5284 bytes
font_01_sfnt_off00005a4b.bin
9698825dfa40e2a3d17a13d2e6805f4435b2718804221b082f3dfb41ad96a596
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 12028 bytes