Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1fd492865d4319…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 00:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 520ff88b7762903208e2023dedaebf24 SHA-1: d0b9e84dc817f651e0c9ec9b444488103a3dad51 SHA-256: 4d1fd492865d431986e404ab7af732aab46ab99fd2336971aa6c77957ba9ec72
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=significado+de+nome+akiren'. Additionally, it exhibits a PDF link farm heuristic, with numerous embedded links to 'static.usrfiles.com'. The document body, though partially corrupted, contains the same malicious URL and benign-looking PDF links, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.me/wix?keyword=significado+de+nome+akiren
    • https://static.usrfiles.com/ugd/b8c837_38fc3c2a44a84348b772489fde5dbe44.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_e55a82707adf45b1b94196a799e86db2.pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdf
    • https://static.usrfiles.com/ugd/7d21c0_c032ac6474344858b3755df872a75b5c.pdf
    • https://static.usrfiles.com/ugd/0df15e_7f48916214a34436a8771e437340295d.pdf
    • https://static.usrfiles.com/ugd/565485_c561570f37c54bc490358d1bdd297a57.pdf
    • https://static.usrfiles.com/ugd/0df15e_f6c4902122f64f7ca21fd2c9bdf2d7bd.pdf
    • https://static.usrfiles.com/ugd/b80405_d766cc33e6734a51b93b7a47ed69cc8b.pdf
    • https://static.usrfiles.com/ugd/e42ee3_2af66353cdc0419eb017651dfd336454.pdf
    • https://static.usrfiles.com/ugd/0049ca_de4e0f900f8e42a1a0442ee7af03a9f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc15fbd2af7f40538e429bed6b43baaa.pdf
    • https://static.usrfiles.com/ugd/2ac701_49b289cfad384fef92033892ef85c28d.pdf
    • https://static.usrfiles.com/ugd/07ef24_576649b977f04b12a0a86b0bbedc3bb7.pdf
    • https://static.usrfiles.com/ugd/253000_adb5079d5b604f9baab2dafee6cbbade.pdf
    • https://static.usrfiles.com/ugd/b8c837_453b49a91bbe4ca78793cb8de7d4e7ab.pdf
    • https://static.usrfiles.com/ugd/07625c_b8f07b4c76654ea2a129ef3984ce898a.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_c74260ce66ff477988848009045095b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_43be3bc142ca4fbea274bbe945c4e436.pdf
    • https://static.usrfiles.com/ugd/8127dd_494bdd3c53074935a1b9cd8f66713c37.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_off000075d9.bin
f602d1f3d4378f405fbf983ec3a202d070cdaa0f26867e7c5bb0fe7fe9ef8356
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 5300 bytes
font_01_sfnt_off000087be.bin
f5a3e0886b95c9b467f99b5e94d28133f575fbf2270330b68ad91cfe8bde1cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 1884 bytes
font_02_sfnt_off000090dc.bin
1557a748781999e652f5a364c032c37bda9d43e156e15663c0e5291885ae5608
pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 13724 bytes