Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42d9e039804bb7a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 07:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 898b1fbbbeaf3813d54b35ab61d5ba16 SHA-1: b94d95a2dcbd1911271045d099045206f65a2a4c SHA-256: b42d9e039804bb7a8887c77a70472df0d96ae66ee10e73ecf9afea0db7111975
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by the heuristic. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for further exploitation or credential harvesting.

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=beehive+class+9+the+road+not+taken+pdf
    • http://files.heryellowribbon.org/uploads/1/3/1/4/131410685/liwipefizosapenubad.pdf
    • http://files.janobykennels.com/uploads/1/3/1/6/131606169/de20f47cac02d8.pdf
    • http://files.stseachnalls.ie/uploads/1/3/0/8/130874354/6fb87.pdf
    • http://files.sendaheartart.com/uploads/1/3/1/3/131398385/325e54fe9.pdf
    • http://files.liberationgifts.com/uploads/1/3/0/7/130739776/cac93a275.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/adobe_reader_for_pc_exe_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/classifying_triangles_by_angles_and_sides_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/94902333313.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/le_millionnaire_automatique_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/pawibuzebisopaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/50837313172.pdf
    • https://cdn.shopify.com/s/files/1/0430/6701/5322/files/51232407241.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/wemijuwilifosawowuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/dish_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7696/6808/files/34734690546.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/c3_c4_plants.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_off00006c8e.bin
7f4e9592e6f216f7b8dc40038845db3be11cac3db65c6b755b20642ba1758dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 5572 bytes
font_01_sfnt_off00007f7f.bin
9ca32c5ed9e7215fbe3b673182b0734d9f976fc36f562c06807cd02c2688e635		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7F 9936 bytes

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