Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc708b346ec2cee7…

MALICIOUS

PDF

51.1 KB Created: 2020-08-30 04:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e1dd5c7c969bd2c66593163585c035d SHA-1: 4726ef71b855c60dd6608ba7af197c0e5bcba58d SHA-256: cc708b346ec2cee79f8cb44e9bfafac089be910bf7a2a8c57e0f3f57051e9537
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector URL. The document body, though heavily obfuscated, contains references to 'csumoodle remote learner net' and the malicious URL, suggesting a lure for educational or remote learning resources. The primary malicious URL identified is ttraff.cc, which is flagged as a 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.cc/wix?keyword=csumoodle+remote+learner+net
    • https://static.usrfiles.com/ugd/d5cf39_e19988572aea4cedaa066579d746e105.pdf
    • https://static.usrfiles.com/ugd/a44510_4bf991ed791742bba3eff133556254ef.pdf
    • https://static.usrfiles.com/ugd/4c1554_f1fae7eec0b64ec29883116b00a64392.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ba279458667455ebbb32874e2a526c4.pdf
    • https://static.usrfiles.com/ugd/9904c2_93e00c2925354da08b62a924057fa571.pdf
    • https://static.usrfiles.com/ugd/1c90dc_6f7a3fc01de34672b7f4bc8ffb9e8f73.pdf
    • https://static.usrfiles.com/ugd/e2c250_a12a9e46ffe94c739ab3f31db7d487c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a27bbb28ce50439b840be802b573fe25.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f4143c3fc0849e3a9f8ae1afe812a87.pdf
    • https://static.usrfiles.com/ugd/b3bc21_e43a2b1f18d24ba18a830575366e0013.pdf
    • https://static.usrfiles.com/ugd/32acb1_ed62b5f5bef549268125f0e9ea827243.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47d828a797a41e9897790c396789d76.pdf
    • https://static.usrfiles.com/ugd/ad2ade_f0590490fdd04d2798a2ea9712bd8f50.pdf
    • https://static.usrfiles.com/ugd/b8c837_0abcaceee78f4e7dbff6621253b4b752.pdf
    • https://static.usrfiles.com/ugd/ab059d_1bf38e4d79cb43a981843e747477e90f.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_off00007183.bin
e4fa524f6c1a5bfa802f96f2181b30994a0b3c08c6d71d42a33c9666b61c117b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 4828 bytes
font_01_sfnt_off000081ce.bin
d3edf919878c9dbbbdf95f69c39d0bc632733a91bfa106d9403262662051adff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 15352 bytes
font_02_sfnt_off0000b18e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB18E 4324 bytes

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