Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce5acf183b64fb9…

MALICIOUS

PDF

50.7 KB Created: 2020-08-29 05:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f91fe3902c8143b0b50d05fcb1d3c1c SHA-1: b3c31fb486e449c7bc69e67f09add0bf5e32c27b SHA-256: 1ce5acf183b64fb92becf9fdd7d363c29df50953357b804f3ad70fff94097dd5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=learn+piano+chords+quickly'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links, while many are benign, suggests a link farm or SEO spamming tactic to distribute the malicious redirector.

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=learn+piano+chords+quickly
    • https://static.usrfiles.com/ugd/b8c837_04fadcb1ee4e467ab7c56182712a4163.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4574247d39a42efb2b447b06046fd2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d29f84383674b1c9f043a0dd805f1cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_17821927c5e34fd98c198a30765cdcdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_28ee1430f79b46dc984a160ba83336f8.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/nisat.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/gupibujavubigi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/top_engineering_colleges_in_hyderabad_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/bipilapefewewoferesenalor.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/cummins_isx_labor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/remusufepupevizemub.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fb304e076964a2db177e8e091212e4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8bb8863f49b47658de09ba7c8d2a5b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2cb5f4316bb4a85bed6c3cf1d51687a.pdf
    • https://static.usrfiles.com/ugd/b8c837_107956d41240409694fc7b6a865564cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0386f3b8c84d4403ae92a649a43a33dc.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/
    • https://static.usrfiles.com/ugd/b8c837_17821927c5e3

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e53.bin
8315df4b7eab80749ae55d768343d60db0b9178216f1a40df2525842e5ff2577
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E53 5392 bytes
font_01_sfnt_off00009099.bin
8770a9d16f6ec8ed1e04f7f31595c1fd3834ff76ff6f55291086ab87d6d749e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9099 2268 bytes
font_02_sfnt_off00009aab.bin
0dde834a96c1afa7bf57b199648f380166c67f0036127b82da160f3a7471f339
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAB 10072 bytes