Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7e0d8644236e97…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 02:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508c7ee5fa5e0d453b471c0349cf0010 SHA-1: ceb6db1ba17b19e04135315ee2e75d78d130c77d SHA-256: ba7e0d8644236e973ce0d57c873dc90a0ce60f08c686dfc361cf3c60c240ac61
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, identified as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=hotels+in+new+jersey+near+philadelphia', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The presence of numerous links to static.usrfiles.com, while benign, is part of the link farm strategy.

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=hotels+in+new+jersey+near+philadelphia
    • https://static.usrfiles.com/ugd/510a18_443ac1b6180247bd975b7aef59c23b39.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_e9508f3d660941c08840a22d8bd68c60.pdf
    • https://static.usrfiles.com/ugd/253000_70ab36a401954948bb9dfcf218bc53f8.pdf
    • https://static.usrfiles.com/ugd/4b68be_763911309eb9470ebd3931c68d6ba942.pdf
    • https://static.usrfiles.com/ugd/affb4a_f90685ece98a41eeadd0af6c44d427bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb1910ab2eb4444caa65a964b73c9678.pdf
    • https://static.usrfiles.com/ugd/b8c837_66a6cfa2ee224b98bf7f8cd17310c0b4.pdf
    • https://static.usrfiles.com/ugd/accd1f_3a46132c74154d0ea1cd6b3835b27f2e.pdf
    • https://static.usrfiles.com/ugd/e2b09b_136de2c50d0b41879c35ed28739daecb.pdf
    • https://static.usrfiles.com/ugd/585b1d_24cb4ab4fb5143bba2dec832215cc28c.pdf
    • https://static.usrfiles.com/ugd/d2751c_916217b6a9724fe88e00e45113682009.pdf
    • https://static.usrfiles.com/ugd/191a6d_6d6260ca31ca44f7804fa057d80447a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dff851d7e044c5e9933dc633b0d4bea.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_4bc877cd257742269ef85d72ad04470a.pdf
    • https://static.usrfiles.com/ugd/b8c837_644cc60047914455abfc88b6ab70a5e6.pdf
    • https://static.usrfiles.com/ugd/ade4e6_d4579404bf6c44718f8231404144c372.pdf
    • https://static.usrfiles.com/ugd/067ecb_d3d696cee2e84ae790366372830e70cf.pdf
    • https://static.usrfiles.com/ugd/10a4aa_862caabae15e4d2bb8d6964ac5ce1a0d.pdf
    • https://static.usrfiles.com/ugd/6116da_772aab5ebbeb450b83d7b45f9d180576.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_off00004cad.bin
a475461b5c443482b5b245e85b3f4308c60616b1885ac08fe6ba29aedbbdc2d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAD 5068 bytes
font_01_sfnt_off00005de7.bin
c88408346885c93aa30b18eb57d896e90ff534327120a8de4495069848eb7116
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 9372 bytes
font_02_sfnt_off00007e00.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E00 4324 bytes