Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95ea6f095589564…

MALICIOUS

PDF

53.0 KB Created: 2020-07-19 05:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9c2437fed11e3173e7396662a45d6d SHA-1: ca99eec925eb985e682094fa2ef4176e8c9002fb SHA-256: c95ea6f095589564fc36df3f1b6fe33aee7e5644637747f404604ce11a6d1794
160 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that these links lead to a redirector known for malicious activity. Another heuristic flags the document as a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of a visible LOLBin execution instruction further supports the malicious intent, likely to execute a payload or download further stages.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.com/wb?keyword=escribir%20en%20tercera%20persona%20pdf
    • http://files.255alhambra.com/uploads/1/3/1/4/131452938/towugezeve-dujozuravoj.pdf
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.pdf
    • http://files.prrofe-olmos.com/uploads/1/3/1/6/131606115/3752455.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.cmd-cn.net/uploads/1/3/0/7/130738534/199230.pdf
    • http://files.iscebs-richmond.org/uploads/1/3/1/4/131453250/kutejilepuju_zubalimuxugexaf.pdf
    • http://files.etudist.com/uploads/1/3/1/4/131452840/a5353ab.pdf
    • http://files.believeitornotphotography.com/uploads/1/3/2/7/132712199/fepebedawog-kutosu-lanakeputirire.pdf
    • http://files.lakesiderockers.com.au/uploads/1/3/2/7/132710628/9407265.pdf
    • http://files.believeitornotphotography.com/uploads/1/3/2
    • https://jurikebigox883042776.files.wordpress.com/2020/06/xumamigamolozox.pdf
    • https://bijixod.files.wordpress.com/2020/06/pimuvizipesoluvejijoki.pdf
    • https://texamepup.files.wordpress.com/2020/06/23617070446.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/daratigitikisejezifike.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/75336897759.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/49181888817.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/vibipibota.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/libomagosekifen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/6803496300.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/gogabover.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/9476996501.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_off00008fa8.bin
dc72f8d75448f82ca173993f6e441ea85b69b9a1853e301b1cce2aff537181af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA8 5004 bytes
font_01_sfnt_off0000a09a.bin
05caa1c64c6ac209b953ae4450f72656b0805f89a0d6672255f61125fb2a5e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA09A 11248 bytes

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