Malicious PDF — malware analysis report

Static analysis result for SHA-256 297c9ed53bea329e…

MALICIOUS

PDF

41.7 KB Created: 2020-09-02 04:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4757818012a2d5d4e3acdfe7d9c6728e SHA-1: 8fb0b6e8766cbae0315096aa7b015b0c234bf4f8 SHA-256: 297c9ed53bea329e5836157b55fa95a64877a3490b75cc7535826d0e0ebeae64
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL. The PDF also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or redirection strategy. The primary malicious IOC is the ttraff.com URL, which is likely used to redirect the user to a further malicious destination.

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.com/wix?keyword=hallelujah+pentatonix+sheet+music+pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/mipejag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/one_less_bell_to_answer_marilyn_mccoo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/algebra_2_book_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0437/3230/4033/files/marawexilemofupusigusumed.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/zalo_video_apk.pdf
    • https://static.usrfiles.com/ugd/f8de3e_2b34548fe22e4fd38b308ba84af13bbd.pdf
    • https://static.usrfiles.com/ugd/70c1f8_b38e39ee826f4b518613b44653c35d94.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/encyclopaedia_of_islam_brill.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/87342320204.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_off00005753.bin
1fd9631dca78ca6adfc1a11829baef0a497945e386c60eb9f8e0f1b31507c3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5753 5404 bytes
font_01_sfnt_off0000699b.bin
40e758bf7886425cb8e17dc5fe7c4e0fb689c138af67e50f499c06493fe86607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 14752 bytes

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