Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d8cc7377d3362a…

MALICIOUS

PDF

38.2 KB Created: 2020-08-15 13:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008a5932e09e0f886ba3dbfcc828b908 SHA-1: 3a3a8720456db44bf3beb4d55ad7accb2e8b9306 SHA-256: c6d8cc7377d3362aad8a4a5e891d541d32b0eb9f42f0894d5e9c55b47a0f600d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Iso 10002 pdf free download' and includes the malicious redirector URL. This suggests a social engineering attempt to drive traffic to malicious sites under the guise of providing a document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=iso%2010002%20pdf%20free%20download
    • http://files.grcrowfamily.com/uploads/1/3/0/9/130969811/5d780831761.pdf
    • http://files.americanawningandsign.com/uploads/1/3/0/7/130739704/4112820.pdf
    • http://files.terraflags.com/uploads/1/3/1/4/131453348/kotogakene-nivafuz-mozevokebuz.pdf
    • http://files.kairospartners.io/uploads/1/3/0/7/130739120/tizagir.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/40990845774.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/tokupenuziwezisunudanavon.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/88805174334.pdf
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/61650811836.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/backcross_method.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6903/files/linux_shell_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/5569213897.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/nicki_minaj_playtime_is_over.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/ritugiduwizunesef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/shri_durga_argala_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/86355954144.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000423c.bin
93fa15dfdb9a5ba177db7d021f086e9e035117c8fe356f7137d2bbf6dffbe824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x423C 5048 bytes
font_01_sfnt_off00005379.bin
0a542afcebd7aac7de628d1162b1c5af5e2bf38d3edd2fe1e3bf7c618e2bb7a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5379 9548 bytes
font_02_sfnt_off00007439.bin
1b83640b5e6d94ed72f9e8b9d7b1afba6bcb4c8604a7b755079f72d05e8a1398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 2228 bytes
font_03_sfnt_off00007d83.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 4324 bytes

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