Malicious PDF — malware analysis report

Static analysis result for SHA-256 98935b81e7911cc0…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 03:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63a0745ab10ef995daa14f201aa04eef SHA-1: e1f0297cf8c9b6bf3d471af84289c963fae4afc9 SHA-256: 98935b81e7911cc0e7887d5ca6c99f4e8af8033642b27ed9ea24ad840ff43bd4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link disguised as 'Lego friends cafe instructions' which redirects to a malicious URL (ttraff.cc). This URL is likely used to host further malicious content or phishing pages. The PDF also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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.cc/wix?keyword=lego+friends+cafe+instructions
    • https://static.usrfiles.com/ugd/b8c837_94a74801f76b4755a92aa15516616763.pdf
    • https://static.usrfiles.com/ugd/b8c837_03d86b7417ca4d8ea362872ef1700ea5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d1585b03d2447ef80abc8ce87e08c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7e646ad1c64a66bb9fcb67025c7c7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_62694bd5de174a3cbe575983660a3ff1.pdf
    • https://static.usrfiles.com/ugd/b8c837_aaea98ca805a4118a92d760239612e5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1fa28cd7f804cd38c43bbb6839a87d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf60f71e75e84616866dc899ae96b425.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbfa3c28af6d4c6399c218417f30d338.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/4963264501.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/createjs_spritesheet_animation.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_off00005a8a.bin
5007060e906a53d5663143a5628c0dd615841d7023ef9941c6ded2b018f866a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8A 5096 bytes
font_01_sfnt_off00006bf3.bin
31e3955f93d03b8dc707e2d302c3ff5259cf29c99ca1d402c6975a8bfa5d25ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 15364 bytes

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