PDF malware analysis — malicious · c07a8e7fcc90912e

MALICIOUS

PDF

32.3 KB Created: 2020-08-30 13:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: af4932f9a0304cd5830e8dd694a796cf SHA-1: ada5d6efe8fefb711cb6712bc2c1d303b5225531 SHA-256: c07a8e7fcc90912ef22cae83be4c7d33e179cea60e64a8175a042c6d547c17a6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a high number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=carrier+weathermaker+manual'. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting a social engineering lure to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=carrier+weathermaker+manual
- https://static.usrfiles.com/ugd/9b7d8a_b85c7a07ba274477b62b9fbb4ae2a4d0.pdf
- https://static.usrfiles.com/ugd/804ff6_64466a9947a446bcb76e2c54b6906202.pdf
- https://static.usrfiles.com/ugd/b8c837_a4828b92555b41358da5203a94787f42.pdf
- https://static.usrfiles.com/ugd/b8c837_f69721c1e91e4e1899830ade4b079143.pdf
- https://static.usrfiles.com/ugd/dc8a8e_ee7c32c5d386410dac5c4f0e81bf526d.pdf
- https://static.usrfiles.com/ugd/8127dd_e7f5cf0ed95c4d028d43a4ac351812cf.pdf
- https://static.usrfiles.com/ugd/b8c837_664361dce9974642b505ccc14f54d4f4.pdf
- https://static.usrfiles.com/ugd/538d67_707bee75dfd444a4a3217ebe609f514b.pdf
- https://static.usrfiles.com/ugd/b8c837_f7a6cfca65204dce83d680068a15a65a.pdf
- https://static.usrfiles.com/ugd/a771bd_697ba337b17042dfb69454f4a0701568.pdf
- https://static.usrfiles.com/ugd/b8c837_ce009ef657864d7f8b0a84db86214aba.pdf
- https://static.usrfiles.com/ugd/08fe48_db4bcdc3595d46548a88383b0bae0117.pdf
- https://static.usrfiles.com/ugd/b65acf_82fb65b8599b43c2a306d12387d23b96.pdf
- https://static.usrfiles.com/ugd/ae15ca_9abdc9e3e2564412bbce433a4c3c2551.pdf
- https://static.usrfiles.com/ugd/7f46b5_d719f046efe24963a5902628e4dfbf44.pdf
- https://static.usrfiles.com/ugd/b8c837_f81a524b494b4cceaccf729746aa510e.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000044d5.bin` `3fd10f92b4b76ceca2d90e0f839185ed34d82b26bae421857dc9dde355eb441a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44D5	4808 bytes
`font_01_sfnt_off0000551b.bin` `51fa1bbe51aa4e8334de210ef9269447b90cccbeee4f881f15d0f632f2181182`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x551B	9236 bytes

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