Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c07191242192fd4…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 02:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb9cbf105c2527f93865ca0e096f27b SHA-1: 01e893d419218fbb42dffe37b5010bf26924c004 SHA-256: 3c07191242192fd4e5b10fb982aee399a3fd3905647e597dbde3d75301d5d24c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack pattern involves leveraging numerous external links.

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.cc/pify?keyword=nicomachean+ethics+book+1+chapter+7+pdf
    • http://files.neenahpowerlifting.com/uploads/1/3/0/8/130813095/pexukof_ruvow_mebirena.pdf
    • http://rulogegaz.pinkturtledesigns.co.uk/uploads/1/3/2/8/132816202/964f7.pdf
    • http://files.wcgamtour.com/uploads/1/3/1/4/131407459/5054460.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/bersa_thunder_380_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/jupyter_notebook_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/16620758447.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/lapezopimate.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/beginners_english_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/sekusarabutadet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/46493496628.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/39281498177.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/bodyweight_recommended_routine.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_off000062f3.bin
772cccb4b3aee74baa6123f4a17fa2cdad97a7c8bd8c280f9fe59233403df37c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 5456 bytes
font_01_sfnt_off00007553.bin
1f1b136247ba655d51733a674e59eb67c200a7f157cf36405040b84eda36ffc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 10976 bytes
font_02_sfnt_off00009957.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9957 4324 bytes

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