Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c0d407e8ac2586…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 21:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cf89616013a1dc8aa9c7bf74bb1d796 SHA-1: 4f761ef1c83b160f4df2a81e4867a7b3eab9d5c7 SHA-256: 95c0d407e8ac25863005327bd1d12a54efbc36858f6055e5b4677e1f344ff9d7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are designed to appear as legitimate documents but lead to a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=quadratic+equation+worksheet+answer+key, is presented as a "Quadratic equation worksheet answer key" to entice clicks. The file's structure and embedded links suggest a link farm or SEO poisoning tactic to distribute 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=quadratic+equation+worksheet+answer+key
    • http://files.thewanderingbays.com/uploads/1/3/1/4/131437249/kafuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/47259419646.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/51859499016.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/vivah_full_movie_720p_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/analog_and_digital_communication_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/xepana.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/bobilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/guzirovavewise.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/common_stocks_and_uncommon_profits_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/bedingte_formatierung_ganze_zeile_markieren_excel_2010.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548f.bin
7f1cd2a5084c51f11897ad60a6d2b6a94ebce7525238288ffa187a774bbd8ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548F 5440 bytes
font_01_sfnt_off00006723.bin
e8720753737479310e133641f2e7bd8a583c1207fd8ff627d443f32de4cd502c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 11036 bytes
font_02_sfnt_off00008ce5.bin
06fe2d77e9a4dfa7c0a99d9d166d861d03a96ef73d7143ca7931dbde4e1d7da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE5 16688 bytes

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