Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48be1d0a28689af…

MALICIOUS

PDF

48.9 KB Created: 2020-09-07 08:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02083b5dc326f5a5315fa6448d2d7b8a SHA-1: ae5025402ac1cf77bcdb396778d2f1b6b57de28f SHA-256: b48be1d0a28689affed04641680b03c79defa20d12918a8f389999c5af64b109
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, also contains the same URL. This suggests the primary purpose of the PDF is to lure the user to a malicious site via this link. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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/wix?keyword=frame+layout+in+android+example+code
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/pdf_file_editor_software_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/vadoxofolifutefutipuwoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/46819648045.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/kukizujujaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/ron_larson_calculus_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/sozubevifupibujipaku.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/barcelona_arsenal_highlight.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/gepivinolikokisuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/xuligowokevitivotis.pdf
    • https://cdn.shopify.com/s/files/1/0462/6399/2477/files/scratch_1._4_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/dawn_of_war_tau.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/vufidofefire.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/askep_bronkopneumonia_pada_dewasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/90884913884.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_off000066e0.bin
b6c20ebdeddcf77934d36b658aab6a2e1b9cd96dba3732f2c1f68e23c1f6c90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 5048 bytes
font_01_sfnt_off000077fb.bin
0fbdcb3af90c7c54239a47110143476cf61cc2a9aeaa7fcc8e6cd1f0381adff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 15472 bytes
font_02_sfnt_off0000a889.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA889 4324 bytes

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