Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e630adb9d5a7fc2…

MALICIOUS

PDF

44.2 KB Created: 2020-07-29 20:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7b7a29a94fbe8f7264fdf4c53dcd6b5 SHA-1: 54838c17a827fe41f86e48fcf2468bd1b50f1cb0 SHA-256: 4e630adb9d5a7fc2c5e9cf77e9ddf863b79283df27db92bde0ba2da3beb8c73b
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with these links. The document body is heavily obfuscated and unreadable, providing no further context.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=blank+index+page+format+pdf
    • http://files.davisfamilyatdeanpark.com/uploads/1/3/1/3/131383665/xegemifarotaworipo.pdf
    • http://files.southcoastguttermonkeys.com/uploads/1/3/0/7/130740252/vowanetu.pdf
    • http://files.nyacklibrary.org/uploads/1/3/0/7/130776037/numemafone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/42876629858.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/35455935169.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/gasixesusupanozatorow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/dakivizimezemetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/22147284353.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/63803572528.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/wugojobaminodimugatijaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/wojijejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/62677768184.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/finemufusiwi.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/
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1f.bin
3cf56ce9c2c407ad2fae477aa56cc387b2043121ac7d65215f77f6f0a8a893e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 5152 bytes
font_01_sfnt_off00007f94.bin
5efed901e91f5ccbbb8a9b95c8c0273a062ac35b60ff6ff060ecefcd7a645b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 10708 bytes

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