Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ad392aa1d059e6…

MALICIOUS

PDF

41.4 KB Created: 2020-09-01 03:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58e260d7986534e8aaf3c0dad21574d8 SHA-1: 19c16a2f90cb15873d36a34b3ef4e0cb8a00910e SHA-256: 49ad392aa1d059e6e4e21945b3a4c0e67b723a185b0da3a04f20f5ddb9f09a4e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, https://ttraff.ru/wix?keyword=commitment+to+diversity+and+integrity+answers, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating the link farm. The primary attack pattern is the use of these links to lure users to malicious sites.

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.ru/wix?keyword=commitment+to+diversity+and+integrity+answers
    • https://cdn.shopify.com/s/files/1/0432/9350/7739/files/bavilexiwekeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/fodazoragoxanub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/16571838931.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/lafozuteligofobiw.pdf
    • https://static.usrfiles.com/ugd/cc14e4_c6486837bc5b41f481b72e67f207fce4.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/xenunenaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1486/files/hasbro_guess_who_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/75817872007.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1602/files/98383295820.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/exercice_puissance_de_10_seconde.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/96865345431.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/39749401132.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/gugukuvugozemigitesadovun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1274/files/rofuxawuterokaluw.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_off00006490.bin
9db7e980f366580602ff02476fa3033b4d054de5f8e2dd4257d76da190e53f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 5272 bytes
font_01_sfnt_off00007678.bin
3e1d7dd53ab112f09d3d5ba9244853b912839edd1fbcc0642c9e076838b9021a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7678 10072 bytes

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