Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb26e4c4584c78a3…

MALICIOUS

PDF

40.5 KB Created: 2020-09-18 08:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9233e0682f20d39af27065d5a65534f6 SHA-1: 496886258a5897abed11b825261f00b5743048a9 SHA-256: fb26e4c4584c78a3c4c2de3ff0d518d22c213dcf6bbad78e7eed6301f07700b1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links, 'https://ttraff.me/wix?keyword=classify+angles+worksheet+4th+grade', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'classify angles worksheet 4th grade' and the malicious URL, indicating a lure to a malicious site disguised as educational content.

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.me/wix?keyword=classify+angles+worksheet+4th+grade
    • http://saxiwo.movementmatters.net/uploads/1/3/1/4/131410818/26f5d2d256a9297.pdf
    • http://files.stpaulstjohnpaulding.com/uploads/1/3/2/6/132695306/230038.pdf
    • http://kisakit.fremontclassof72.com/uploads/1/3/1/3/131381787/1019272.pdf
    • https://f9f1de51-fa5a-4fd3-888e-e3f7d6d0ff14.filesusr.com/ugd/e32576_bdf0496a908c45208a56208a7b54879d.pdf?index=true
    • https://388c6035-41ba-4748-a7b6-624457627c81.filesusr.com/ugd/067ecb_0980f9e60d294082b6e17817ce827a87.pdf?index=true
    • https://2e8324ae-7bf4-4552-883f-f120bf41d836.filesusr.com/ugd/34e21e_93eb1507e07e4196850759726a3270ee.pdf?index=true
    • https://c5322874-7743-482a-9ada-5945e733461b.filesusr.com/ugd/d78803_d9da3284229243b9b96a05b2c6b36f90.pdf?index=true
    • https://a074346c-3768-4d63-b6ea-701498c703ee.filesusr.com/ugd/cbe7f7_bc3153118de74525b07ab3b77b6c6b5f.pdf?index=true
    • https://cd3815c9-c955-4325-9f29-0179286504db.filesusr.com/ugd/4cf28d_054cceb1575947b1ace808e3ab0dc888.pdf?index=true
    • https://4ce1a7b4-3086-4f46-8f83-c23bb8f7e550.filesusr.com/ugd/ff68bb_07d743b9b9454a089499208ed877938b.pdf?index=true
    • https://3001f0de-d613-416a-a39e-c829818b3732.filesusr.com/ugd/3fb742_b6a9d14ae40c49769653095694bcd257.pdf?index=true
    • https://a93db66b-03a3-4e83-b8f2-6cf4c5c33692.filesusr.com/ugd/31bf02_c2b4cc76c4a3487ba64f4547943a41ca.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0452/1276/2263/files/guide_to_sarms.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/lexajatarino.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/82648272246.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_off00006060.bin
d61256f2c9b62b783ba5e7b78b1849a83be6751ca0e26f027e25925e650a16e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 5420 bytes
font_01_sfnt_off000072e2.bin
60194827c2eb22da339e4d821385ce8866537c920b4ddb0ed2bd9abf79cafe9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 9992 bytes