Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d293e605a6eed0b…

MALICIOUS

PDF

47.1 KB Created: 2020-08-29 14:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4feb867c7f2ac9d0ed77672279e7efb1 SHA-1: 0665fdd4e80406a55eaeeb50ea8f15b044d072c3 SHA-256: 2d293e605a6eed0b2d4502f596546e802ce98a8dc5586fb65479d4ac98f4b3ea
120 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 `https://ttraff.cc/wix?keyword=shsat+math+practice+pdf`. This URL is presented within the document body, disguised as a link to a 'shsat math practice pdf'. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The primary malicious URL is the most critical IOC.

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=shsat+math+practice+pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/59085034366.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/icsid_reports_volume_8.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/15627092128.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/watlow_ez_zone_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_62a70bef59b54f0592c899bfcb29f045.pdf
    • https://static.usrfiles.com/ugd/b8c837_9af46248882e4cb8a4ef6472e33dd1e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b525a2971e46f187e573606558a986.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ffe5edcb4a54baeb9ebfe90d70fc474.pdf
    • https://static.usrfiles.com/ugd/b8c837_54aff90327a942fe8d998f90f4cc31ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_608884fc84034fe986dfb8216e21df7d.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/mastering_the_art_of_french_cooking_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/gedotejufinep.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2916/files/85720782492.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/60737169736.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_off000079f4.bin
bf50232ae8667741caf45f329e8a72c628c0201709f9808699015690c1dc2945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F4 5464 bytes
font_01_sfnt_off00008c5d.bin
7ebeec9246ace77f45652516e5a8b42d586116317e7c8c54ab55af22e859b4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5D 10272 bytes

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