Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca93ff58ffeea9e…

MALICIOUS

PDF

33.3 KB Created: 2020-09-03 18:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afdaa85d0263fc488e2e08ef39c5e632 SHA-1: 6d78a07b322c9916ba68b355387ccb7b46c688a1 SHA-256: 3ca93ff58ffeea9efc2c96b81a51e2e9aaf845394f10f5d90d143e4f0956201b
150 Risk Score

Malware Insights

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

The PDF contains a critical malicious redirector link pointing to 'https://ttraff.me/wix?keyword=non+fiction+guided+reading+activities+year+6'. This link is likely intended to lure the user to a malicious site, potentially for phishing or malware distribution. The document also exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, many of which are hosted on static.usrfiles.com and confirmed benign, suggesting an attempt to obscure the primary malicious URL. No scripts were extracted from this sample.

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.me/wix?keyword=non+fiction+guided+reading+activities+year+6
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/19875389714.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7965/files/39544211936.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/50483650106.pdf
    • https://static.usrfiles.com/ugd/a107db_cd87487814ba46f587783e3475335313.pdf
    • https://static.usrfiles.com/ugd/dba42a_c281d68214c24e11ad5d76e67c3bb48b.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_3e47275003e34e80b51e94599db31f10.pdf
    • https://static.usrfiles.com/ugd/96768c_78f75a1d981448fba06ab32801c9fd73.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/bollywood_movies_2016_sites.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9127/files/83518355536.pdf
    • https://static.usrfiles.com/ugd/529dbf_43f5b17e9a414d6eafc94a79cf61a49a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb28dda2c08d462290a8804f671fe9d8.pdf
    • https://static.usrfiles.com/ugd/08e331_2c28adce06b047a7896aa7ad2c21bad9.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_off000043e2.bin
705e6f85a03e026f65b3a4be5f7cf0bcde83aa15b7fd9fb05a641a353831ba33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43E2 5444 bytes
font_01_sfnt_off0000568a.bin
b37a4322ddad0dc8e90c2e29e405d919dca91eb396da27dbaebfa1dcc990a135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568A 9832 bytes

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