Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ba974e074afd0f…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 03:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea4997a43b49c923193185d1fcf817cc SHA-1: b36e1d2574538c1ce426a88232d9e600d503ccfb SHA-256: e7ba974e074afd0f91cf3cd4a6e6cda5433490fc8ba9824c1eb20eed6ec96b73
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to legal terms ('bailment and pledge'). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The primary attack pattern involves redirecting users to malicious sites, 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.cc/wix?keyword=difference+between+bailment+and+pledge+pdf
    • https://static.usrfiles.com/ugd/79cb75_03b16075a32e4adf8390094b9857857f.pdf
    • https://static.usrfiles.com/ugd/d775a9_df88680c024b496faf599e1f7bcb29c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_10bbf1f3083b4508a2fc06a12fa4fd97.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/muwilesuwalufetuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/kodetasapixoromi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/wagawurijofabiwosujefidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/69904243598.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/coloring_house_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6502/files/cell_culture_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/56558676209.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/nakofozusedipezoget.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/okhttp_file_with_progress.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/jatosisimom.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_off000075ae.bin
b036db128a26268e481f1cb3fe6f9a05e879acc567ad1febb758345c5645cb62
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AE 5528 bytes
font_01_sfnt_off00008873.bin
a12d5c93c04b9db49641864f8a2f4c52b794212de74bfce763fd9acc895b7246
pdf-font-stream PDF embedded font (sfnt) at offset 0x8873 11232 bytes