Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f969b4032569d8…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 10:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65785c3902b4801848206c3f8580b30a SHA-1: 7438b0a098dbd04da11bcc215a8bf9295cb499b3 SHA-256: 57f969b4032569d8b771b6180eaf59b914585572520f425c40dfaa9837812edf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the malicious redirector and several benign-looking URLs, likely intended to mask the malicious activity. The presence of a malicious redirector suggests an attempt to lead the user to a site that may host further malicious content or phishing pages.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=hyperbola+problems+with+answers
    • http://fiwipefo.nabhanlaw.com/uploads/1/3/1/6/131607505/bewukujixuwulibiboji.pdf
    • http://files.thepaganpicnic.com/uploads/1/3/1/4/131437107/piritesapomufu-jolukuvev.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/86674084568.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/68406722958.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/ca_final_new_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5458/files/categorical_data_analysis_by_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/analysis_and_interpretation_of_qualitative_data_in_consumer_research.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1944/files/sojebobatofodatunez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/zibopidarow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/35440758167.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/xibaregajobilamapegazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/risumamaduzozivovijaba.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_off00005bd3.bin
9ed0ecbf9e76fd14ee7bcc5ce05e60d21f570a44b2c501387b2966ea876abe54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5356 bytes
font_01_sfnt_off00006dee.bin
b0a313ba1ee6a6bd7f664ba872cef44d113a0f67264a88638fee4e66b13312ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 10668 bytes

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