Malicious PDF — malware analysis report

Static analysis result for SHA-256 42be5b1ea6c74ad9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 04:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55ca1980076f9b075794c2b0ea2b4d05 SHA-1: 8d03842880c8f4cfca8d2f72e68e407208b70c0a SHA-256: 42be5b1ea6c74ad9f3272ef9c5a7c6aea3af7e6de513ee63f790f75300130563
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 manipulation or to obscure malicious hosting. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious sites. The document body, though heavily obfuscated, contains references to Android and Samsung, potentially as lures. No scripts were extracted, and the primary malicious activity appears to be the distribution of malicious links.

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/pify?keyword=android+10+samsung+galaxy+a50
    • http://tevepoku.thothandi.com/uploads/1/3/1/4/131405965/xutaputunaxetif.pdf
    • http://pisivoge.networklakestevens.com/uploads/1/3/1/6/131636655/bixevadinuv.pdf
    • http://tusupa.forsan4e.com/uploads/1/3/1/6/131636665/4654948.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0770/files/utilitarianism_ethics_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/computershare_transfer_form_and_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/46332477319.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/klackers_dice_game.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/beer_brewing_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/16480672363.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/36469689439.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/29814287707.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_off00006ea2.bin
243aed2649dcec43dc2959e5060b6296905d2bf8257f1fbdb93f90d8a6bb969b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA2 5624 bytes
font_01_sfnt_off000081b9.bin
223ba4be16d39114a91041bd2f767eb52c223e09afb62419bbcf4f325095dec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 10436 bytes

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