Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb5bef188f10bf6…

MALICIOUS

PDF

53.9 KB Created: 2020-07-31 04:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8427a19d78be1d9d5ad5e953c4f1dd21 SHA-1: 21c9b6776b890324232829d5eee43b2ff69fc474 SHA-256: deb5bef188f10bf6e8730521da766bb3cb98e1fb73704fbddb8123a079b9a821
120 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a link to self-help books. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of similar links were generated. The embedded URL leads to a redirector that likely serves further malicious content.

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=best+self+help+books+of+all+time+pdf
    • http://files.newrenaissanceink.com/uploads/1/3/0/9/130970004/d0bdac9d6.pdf
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdf
    • http://files.desotoyou.com/uploads/1/3/1/4/131452988/wojimemulol.pdf
    • http://files.ssatroop3.com/uploads/1/3/2/6/132681409/batitifanuf-tekixuri-nugolabalif-liwupujirebajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/jixegakawinomonesovoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/69394338391.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/86219515533.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/bafivegajukoraguxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/9039605916.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/gizasutuwex.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/vadafavabaluwoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/diwovebokexetoxofiwun.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/vuzokuwinarezowajipiboku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/neterozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/denoxuwofasagiwaberasiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.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_off00008b2e.bin
0c089a6ed79412f899ae822e62f38853bfcc85a716fafcf277682ea344992f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 5120 bytes
font_01_sfnt_off00009c8f.bin
4ae8fac4ab76fd2f0cc73f0125a8dac720b8ba70953040776cd8a8b9a4729da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8F 2444 bytes
font_02_sfnt_off0000a636.bin
ef0e42c1f305f7e974b8be29e98f9dc601b92230aa9e99098598e0dab87ed8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA636 10296 bytes

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