Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f83082bbe201d3a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 18:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 578102854b90eae32f58f825efa51a52 SHA-1: 6880330349428d5c3f0b296b905b743fd4b1c807 SHA-256: 3f83082bbe201d3ac201baae5588be47ffd77b4ef93a54d774a786b3384da3b2
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many of which are likely part of a link farm. The primary malicious URL identified is https://ttraff.me/wix?keyword=skogg+system+workout+schedule, which is likely used to redirect the user to malicious content. The document body contains obfuscated text but also includes the malicious URL and several Shopify URLs, some of which are confirmed benign.

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=skogg+system+workout+schedule
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/developmental_psychology_childhood_and_adolescence_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/94860504825.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/context_clues_worksheets_with_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/fuxefewurafete.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/medezaxuxusurun.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f5de14617d5407e8f4c54e057b94155.pdf
    • https://static.usrfiles.com/ugd/136d07_3d8dacd1f0564f19b9cd52c9916f7167.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3cddb0cad2f4dfdb061d0873098eabd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b86c36ca60e9492c9ac620fe6bc4e91a.pdf
    • https://static.usrfiles.com/ugd/590778_badd9f733e3f4446a22b1f18bff5a8e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a69c188e6dac4e05bb7d09d2ebeec3c7.pdf
    • https://static.usrfiles.com/ugd/3f4b99_27fea96f123c43c1bfb3563c9970f552.pdf
    • https://static.usrfiles.com/ugd/b8c837_33b346c0979a488581d3e6caddb636f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6f2e82f2056476c8f128984f862d88f.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_off000067c1.bin
02bee283bb118006eee205d4f9017988b18b3f37ea16031ca81d959744ae7564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5504 bytes
font_01_sfnt_off00007a65.bin
5aaaee832ad3ba7b2632d2f236bce176cf859d2a8b68122d0a549de9f618e597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 10232 bytes

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