Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35e5659a37678c5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 04:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e2973756c3050bc1655f8541a89a225 SHA-1: 61b15a7b3adb250ee62cb324b6e51af8f44e6953 SHA-256: c35e5659a37678c542c00dc53046d52a9e115ea49733d213909d39794fa7749c
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, 'https://ttraff.me/wix?keyword=lord+sakuza+sekiro', points to a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous links, including the malicious redirector, strongly suggests an attempt to lure the user to a harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=lord+sakuza+sekiro
    • https://static.usrfiles.com/ugd/b4609a_8920d145b049475ca977bc598e891aa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c000e4c12a145e98246d6fbf9937f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe1cf5927d1e4b91a05f92b4c3a8a57b.pdf
    • https://static.usrfiles.com/ugd/d5415a_795e802b8dee4696bc58a309b6753c78.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d7af03a04d145f7a49d1f0b9cdc5789.pdf
    • https://static.usrfiles.com/ugd/b8c837_70daa1f1fdf1455cbc981c6cfc1217fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_bedd59bc3608430b8d6daa71dfe55e40.pdf
    • https://static.usrfiles.com/ugd/b8c837_406e5f5349dd4ea8af05a25f436413b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/modern_baybayin_keyboard_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/tinuvutajimekufobedupij.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/9087582369.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/56900191466.pdf
    • https://static.usrfiles.com/ugd/89c6ad_170104c207fc4b40936949e65ca9209b.pdf
    • https://static.usrfiles.com/ugd/b65acf_9192cf7eba494418b82e09d1edb01aa3.pdf
    • https://static.usrfiles.com/ugd/e73fea_7639614b8ed7434ea5954f1ec3e764d4.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.

FilenameKindSourceSize
font_00_sfnt_off000065a9.bin
7a7b9298c2085b5620d5e07029ad16e409b1b82b9a50735a831642f55dc7d38a
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 4844 bytes
font_01_sfnt_off0000763c.bin
52023e22948c7a042c1c6e859d0a7d9ee6a6f685a4142b36fcf631e7b6a7d6a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x763C 10884 bytes