Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d346b7df5b5abc…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 05:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bdbd8791fc37f37d036df1df2d145a0 SHA-1: 1b4c08aff4b1ab728e753675cc6051898eabaaac SHA-256: 99d346b7df5b5abcbc55df9dff33edb26539d85654e97024c6f8d3d44abc1e95
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, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=the+pillows+spiky+seeds', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs. This suggests the primary purpose is to redirect users to potentially malicious content or to engage in SEO manipulation.

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=the+pillows+spiky+seeds
    • https://static.usrfiles.com/ugd/9ea91e_e787c31d7d4541b680348c6147caa48e.pdf
    • https://static.usrfiles.com/ugd/affb4a_21e134e9ce474bea9ddb12f5f1c4cd54.pdf
    • https://static.usrfiles.com/ugd/b8c837_8647b3c843e949dc9afb1a4109e3314e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca8b31c9d3a34512a3594702ac7bedb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbdda2062e194e7c9f12cf4085951b7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb2dab041f91476bbe2e1167e20a9945.pdf
    • https://static.usrfiles.com/ugd/b8c837_cce7a4f23653497ebb1e0607be8b4cf1.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a36348727c4e4a8f130218f187521d.pdf
    • https://static.usrfiles.com/ugd/dad90e_94114f9cddbf4cd6959062e217dbdf81.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/fabake.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/apprendre_l_anglais_en_30_jours_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/29346619123.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/change_to_word_document_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/66640295738.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peregomosurexezobosezob.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/92705347699.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/somatic_cell_hybridization_in_animals.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/chandramukhi_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/luvunavujamedam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056b8.bin
1f60dcfbe151cade3dc08f66d5dfef0615914b729acf8cf34fb9c8f6dc67b124
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B8 3892 bytes
font_01_sfnt_off00006476.bin
2050730da31cc8eca7f07587e5ccf9632bc860bdea9a2d0bee2d657d15de130a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 4948 bytes
font_02_sfnt_off00007560.bin
073c8a91bcd6d8e0822d848f7c5a84549fec73b748a636b13bf455ea2c25b62f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 13884 bytes