Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae821195052dbca5…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 06:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca1ef1716c7a5bee234458611b9097c SHA-1: 16f19afa1e355cab3152f2907b5fbb26943434f2 SHA-256: ae821195052dbca591a5e9a8c1db3521d3e55fb790b60444ed301a9083a8402d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL, https://ttraff.cc/pify?keyword=mandatory+reporting+decision+tree+qld, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the same lure and URLs, reinforcing the malicious intent. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=mandatory+reporting+decision+tree+qld
    • http://pavulitak.kingstrees.co.uk/uploads/1/3/0/8/130814328/8816565.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/5912029657.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/13645846097.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/wasujupul.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/81987374090.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/85001392978.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/sokkia_total_station_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/sat_2_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/35339881814.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/nilume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/7768217649.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/clicker_heroes_import_cheat.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_off000063a2.bin
39e25cb3066f5c660efb82f013c349eacc9a010b05b116d45fbaa7053d7d44b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 5476 bytes
font_01_sfnt_off00007654.bin
ed0c99a18f6ec0b625c29a7d4d7eca203d289099bff6faca572ffa11c08ce73f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 9952 bytes