Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8db5807620a7a8…

MALICIOUS

PDF

42.3 KB Created: 2020-09-08 20:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 692f43a09669763cfda34c8328008b08 SHA-1: 5a5ec46325e8ab225804def3001e3eadfe8faefb SHA-256: bd8db5807620a7a86dba3f59aa548bc141d1d87720e87f44b70992362b96b321
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, noting a large number of embedded external links. The document body, though heavily obfuscated, contains text related to a calendar template and the URL 'https://ttraff.link/wix?keyword=able+calendar+template+june+2018', which is likely the primary malicious payload delivery mechanism.

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.link/wix?keyword=able+calendar+template+june+2018
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/45622964218.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/jesurupuwirepaloba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/67481328224.pdf
    • https://static.usrfiles.com/ugd/45fd81_bb6a68be28144effaab098c0d395ab67.pdf
    • https://static.usrfiles.com/ugd/6df952_e4c3556ed6724cd4b7f5235ef7648e99.pdf
    • https://static.usrfiles.com/ugd/74c34a_097fe89bb32540988977b1bc8e9ae861.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/fozemijonijonibereko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/30240868203.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/22949025355.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/55809558000.pdf
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/the_curious_case_of_benjamin_button_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/6530/3194/files/another_cinderella_story_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/95672086256.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/nesujopisibo.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_off00006502.bin
039a9bbdeca942bab042df4276cbe3f195d30eaa19b7f0303e25a5f680cedbd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6502 5764 bytes
font_01_sfnt_off0000788c.bin
67c739c79d66a25aa9c056f1d43ecbb287ee29e8490e0bb598d390cce4bbeab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 11152 bytes

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