Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef153bec1cb071c…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 08:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c73dde4d28947c2b138f0aab10f049a SHA-1: 0b74f76f5be84c021de15ddb5a71cb3791a4370e SHA-256: 3ef153bec1cb071c5900bf4d9bed9f45b7245c334e55922b0733da220723dfc4
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=weather+report+tomorrow+in+kerala'. The document body, though heavily obfuscated, appears to contain text related to weather reports and includes the same malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve SEO for malicious content.

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.com/wix?keyword=weather+report+tomorrow+in+kerala
    • https://cdn.shopify.com/s/files/1/0459/3290/4615/files/34296505575.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/53955076250.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/46707672895.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/wowojoweginajefuso.pdf
    • https://cdn.shopify.com/s/files/1/0437/3164/8661/files/fawaw.pdf
    • https://static.usrfiles.com/ugd/c3548c_8b31eca4dc8f4dc680d3d26f3895c11a.pdf
    • https://static.usrfiles.com/ugd/7f16bd_cc5b2c50a5c245c69e02d2c726af3bc4.pdf
    • https://static.usrfiles.com/ugd/fe83c3_795e76a503164f5595123107473c0d68.pdf
    • https://static.usrfiles.com/ugd/87fdc7_3928395323c240439af299270cedac10.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/rejiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/65059204850.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/setejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/40357866051.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/25628771862.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_off00006aa1.bin
04594d17930db3b9ab9ec623ca071447d1c29a223fe412bb0ec16dd45e0240e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5052 bytes
font_01_sfnt_off00007bb1.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 1936 bytes
font_02_sfnt_off000084f4.bin
47bfb75270840f98f7a994b4427f11d079e9d67a2f329b73e40b2222172e0a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 10880 bytes

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