Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2c2e21f069f217…

MALICIOUS

PDF

43.2 KB Created: 2020-08-29 21:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4757120e310ef938152628467c29a532 SHA-1: 6af5d101800a5d2887d4874a44a0b5e76c29e23d SHA-256: bc2c2e21f069f21784c5858d617faf1a233af70c6445225df9014bc9607c0396
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO spam or to distribute malicious content. One critical heuristic identified a link to 'ttraff.ru', a known malicious redirector, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text but includes the malicious URL, further supporting the malicious intent.

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.ru/wix?keyword=realtek+hd+audio+manager
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/gubugamoraf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/demiberakiranuxariba.pdf
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/dakubi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/cfa_level_1_books_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3a0e089808f47c389381177e87b4416.pdf
    • https://static.usrfiles.com/ugd/913720_8905848381b34c8a999576eda6c0a1d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba1e786e43e04857b650d89becbf6bf7.pdf
    • https://static.usrfiles.com/ugd/136d07_52163ebc58fb41ea96c14a732ef16038.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ba75142c7ae4212aef37ea6fb412455.pdf
    • https://static.usrfiles.com/ugd/7e6083_2913c3e535ff42b1a8bc0ec8075b2489.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/legend_of_zelda_nes_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/75649146250.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/32516396314.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_off000067d2.bin
e279baab85b39a131c52c15a1a635eb43d80bbc53e3e791a290bb02ffc223e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D2 5132 bytes
font_01_sfnt_off00007923.bin
d8634f91a274c92485ea35235bd05a0e17674d066d633ade56cf440e8256b339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 12548 bytes

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