Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcb3e2d849f4009…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 02:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e313db9c8f2bbc91651e1e23fc49530 SHA-1: ead99fb1c02600fc6d62b8a303f8d8debcab567d SHA-256: 3fcb3e2d849f400947aea28d9b2acc874b4866fe6a423fd350e3f63fe99a1a09
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links pointing to external PDF files, a technique often used for SEO link farms. One of these links redirects to a known malicious URL on 'ttraff.ru', indicating a potential phishing or malware distribution attempt. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, and the embedded links are likely intended to lure users to malicious content.

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=bonjour+mon+ami+font+free
    • http://files.lifewithsqueaky.com/uploads/1/3/2/3/132303337/gajawubebajakudekev.pdf
    • http://wujoz.daradee.com/uploads/1/3/1/4/131407089/496122.pdf
    • https://cdn.shopify.com/s/files/1/0445/5782/8260/files/biology_gcse_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0445/6103/9524/files/snipping_tool_shortcut_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datofugilasififuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/picture_addition_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/51672411219.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/tukefikebasozor.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/mivijajebokimep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/94629601632.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/tarabiluzupikedilevijusef.pdf
    • https://cdn.shopify.com/s/files/1/0449/6257/8591/files/77630088368.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_off00005db4.bin
cbbcb148801713161a1bd794d6b47f81bf2f12181067d3b7472739d1f20138ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 4828 bytes
font_01_sfnt_off00006e09.bin
a62344d0cd7b3cd07a19f0718f3fbc4aeb2d0d607217eddbbd6af15a07b2a311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 12536 bytes

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