Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf77906ed6fe8909…

MALICIOUS

PDF

51.6 KB Created: 2020-08-29 02:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1599e64fdf6c72db51483f6d71654790 SHA-1: a075964ce3da13b3650f34be1675f8b65606752a SHA-256: bf77906ed6fe890943e612170077e74b2cdf8f02becc8c5991f4fe4d6f02b4c3
140 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is a printable to-do list, but it also contains a critical heuristic firing for a malicious redirector link. The document body and embedded links point to a URL hosted on 'ttraff.ru', which is flagged as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious destination.

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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.ru/wix?keyword=printable+to+do+list+excel
    • https://cdn.shopify.com/s/files/1/0462/3899/0485/files/99043514841.pdf
    • https://cdn.shopify.com/s/files/1/0459/9100/2279/files/dutesuwivavegugotodik.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/43929350004.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/10155051071.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wofizafadunemewu.pdf
    • https://static.usrfiles.com/ugd/b8c837_6902fd47bee947a9aeb8e43c9f1216b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5de1547722814700afd074516b959dc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_51220ab7a3b94a4287df295a24eeeede.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa303996bf77468ea87058cdbfdc377c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/38857468428.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/63120615096.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/glittering_images_camille_paglia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007770.bin
cfe744dda04cade9133043afb878cebeaffea62201d5e441665e909d4f5a6aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 5144 bytes
font_01_sfnt_off000088e9.bin
ca40a08c6f20ec5f33df5711d5f5cf0ed319e6c5dfd2c85303028d16ffc2e584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E9 10440 bytes
font_02_sfnt_off0000aca1.bin
f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA1 16144 bytes

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