Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee40e8b5a44b7ef…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 12:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e405e4059e03863e84a0814cd83354b SHA-1: 6d8a15bee5d0ae7b1dcecd88c35f86bb84f40b75 SHA-256: bee40e8b5a44b7efbad52bdbedf3a2424569915f56d007b38b9d6e756e341860
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=realidades+2+capitulo+1b+page+25+answers', is the primary indicator of malicious intent. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient for a high confidence assessment.

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=realidades+2+capitulo+1b+page+25+answers
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/atkins_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/rikakaregirarolumose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/boloburavomokemuwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/invoice_form_template_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0444/3108/1639/files/sheltered_english_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/39843453225.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2905/files/wofomile.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/12159285088.pdf
    • https://static.usrfiles.com/ugd/b8c837_0520b94c0f5e4d7682e4512e462c7469.pdf
    • https://static.usrfiles.com/ugd/07e02c_f288d33c0ea64e10a847614541c75c8d.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_off000071b2.bin
ffc66b38662aee68bc877caf886828aceb1f9ce522f84a941c9633a538446633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B2 5788 bytes
font_01_sfnt_off0000858f.bin
326bf781771c8c8eb86be684118aa0650fd4101b5ed32f3090999dda865e596e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858F 12004 bytes

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