Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7528ff592450995…

MALICIOUS

PDF

33.1 KB Created: 2020-09-01 10:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f91edc03cbdbbae1bc30a2159a5c16 SHA-1: ea38861fdb4e4f1dec41bb3e4b380511694737bc SHA-256: c7528ff592450995decaf1a2717f84a10d26302a1adee3b53b70a1a7a5f54d37
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, specifically pointing to 'https://ttraff.com/wix?keyword=nelson+workbook+answers+grade+7'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into believing they are accessing educational material. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility 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=nelson+workbook+answers+grade+7
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/hdfc_mutual_fund_sip_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9380/3679/files/lucy_daughter_of_the_devil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/24610702452.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/escape_room_game_answers_level_82.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9196/files/astrophel_and_stella_full_text.pdf
    • https://static.usrfiles.com/ugd/b914b5_9cc6395ecdfa46ba8e9b7c7e2e4d5190.pdf
    • https://static.usrfiles.com/ugd/0c268c_62ef5e41713e4616bdcedadcf4496fc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8dad06ab114994a11c46421c81dde1.pdf
    • https://static.usrfiles.com/ugd/41a0b6_7c81ecae28eb461f9ad965e0dd371aac.pdf
    • https://static.usrfiles.com/ugd/ee6770_851ab67b615b43849cbabc805257a95a.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_off000043b9.bin
87dfad1a0d964a41373dc926a63025fce49d8d1ed664190ca9d57ecadce8a793		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43B9 5340 bytes
font_01_sfnt_off0000560c.bin
ace34ea1b098db443242a676328939bbd26526c21e682aeacaaf881808e5a405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560C 9964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.