Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93716b9b8410fdc…

MALICIOUS

PDF

44.2 KB Created: 2020-08-03 08:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f2042f3697b0fe3002a88a91066a45c SHA-1: fb786a377e5009292b31839a779a2d1b01381488 SHA-256: b93716b9b8410fdc5afae1df99e099c8a775295c1a369ca78587dc9e865d3a00
120 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 is to redirect the user to a potentially harmful website. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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/wb?keyword=manualidades%20de%20papel%20faciles%20y%20bonitas%20y%20rapidas
    • http://files.irishsociologyblog.com/uploads/1/3/0/8/130813357/sojuxivoronifobu.pdf
    • http://files.lauracheunglee.com/uploads/1/3/2/7/132710565/9ea7f3b0056e9c4.pdf
    • http://files.peacelovela.com/uploads/1/3/1/0/131069781/zamatepizebumedabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/75940800875.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/mom_son_3d_sex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/wolinazideworo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/3304860525.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/viwupinewikagifuxupinel.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/3240822319.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8776/files/93939456566.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/37816955047.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/98554145875.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.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_off00006b28.bin
7b4689ea029c04423edd9a63da110ad2dc89f447b021693d54f7f5de55353c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B28 5396 bytes
font_01_sfnt_off00007da1.bin
1bcd6c888d904819f43393a731a579e905089e913010e2d7f69514c2a4df9fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 11108 bytes

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