Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d09f82ee5b00e8…

MALICIOUS

PDF

52.7 KB Created: 2020-08-31 21:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f0041b46cbf0a5b9fbb2f0f22610e6 SHA-1: 656c9a1df0280d7705a0f5c13f15ba58d9bc8fc8 SHA-256: b1d09f82ee5b00e8270638f43bb4d3af7303f34fb7617f85e41ca43b9e9c1119
120 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as 'Ncaa clearinghouse information' that redirects to a known malicious domain, ttraff.link. This heuristic firing, combined with the presence of numerous other PDF links, indicates a link farm or redirection attack. The document body itself is heavily obfuscated but contains the malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.link/wix?keyword=ncaa+clearinghouse+information
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/bin_sachivalay_clerk_model_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/kti_bronkopneumonia_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0448/8734/3271/files/32233847595.pdf
    • https://cdn.shopify.com/s/files/1/0462/1733/0842/files/76500075804.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/katakalekes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/61252480067.pdf
    • https://static.usrfiles.com/ugd/8ab72e_26b79678ef0049c0a82ef3f424f23b9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4428a6865b444c5a8e2229b284c24979.pdf
    • https://static.usrfiles.com/ugd/83b1b3_130868759899434b98445633725da196.pdf
    • https://static.usrfiles.com/ugd/3fc21f_dea1715543cb42d28090668485d58ea5.pdf
    • https://static.usrfiles.com/ugd/a298ce_8fb07422f3364102a29bbc3188f8c299.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2b371bcc72483caeeb6e56aeef2e0a.pdf
    • https://static.usrfiles.com/ugd/de60da_b5eb558a420944448628e005c0aed6c4.pdf
    • https://static.usrfiles.com/ugd/469aea_4dee2228620347d2915f5fb24c3c1d9b.pdf
    • https://static.usrfiles.com/ugd/5360f8_de0231e4dc0d4401b52abf04bdc86a9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac5.bin
99ded188e226e39593a4890b6298adbe856badd97d15f700ba9500dddfb2f533
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC5 3036 bytes
font_01_sfnt_off0000758e.bin
a5c0a6a94bf4b8379e974941a6d2ee005404db8f927c6c831300def3a2436908
pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 5148 bytes
font_02_sfnt_off000086db.bin
18f5713d970e3a38b4aa0c1758551d4f079b9c0d060b0d6f761181e04171eea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 15676 bytes
font_03_sfnt_off0000b726.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB726 4324 bytes