Malicious PDF — malware analysis report

Static analysis result for SHA-256 321ee8002767a5a1…

MALICIOUS

PDF

52.9 KB Created: 2020-09-04 17:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e854dc4ddc8eafd33a963e5355da7fa SHA-1: b0e00d0c0991d35a0b2a44da66ebfb66be27ff43 SHA-256: 321ee8002767a5a11bcf1ace607e2cb6c40c9a1460f65d50c392177db8d6020f
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. It also features a large number of embedded links to external PDFs, indicating a potential link farm for SEO manipulation or to host further malicious content. The primary malicious URL identified is https://ttraff.me/wix?keyword=canada+election+platforms+education.

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=canada+election+platforms+education
    • https://static.usrfiles.com/ugd/01e791_49c1fbde429941edb2eff8d50b54dc2a.pdf
    • https://static.usrfiles.com/ugd/4fb05f_ce5dba038f7b4a8ab4162a4cc39249f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_503930efaa134338ab701eb24487daf0.pdf
    • https://static.usrfiles.com/ugd/dc98cc_929ce5f857564734b7ce3e3d70ef6008.pdf
    • https://static.usrfiles.com/ugd/b8c837_636df3f81567434b8f96819371890238.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ecd29a50d8c4831847747d0c6715636.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_41a12709c5fe4e129d061bb58bccb3e1.pdf
    • https://static.usrfiles.com/ugd/83b1b3_305a8208d8aa4e32a84ba9c57cc6323c.pdf
    • https://static.usrfiles.com/ugd/b41a9a_a7cd372d81274c4aa5496f7b52ec212f.pdf
    • https://static.usrfiles.com/ugd/027f51_89c0e1143e2f43e5a4f2fa76b1321ad7.pdf
    • https://static.usrfiles.com/ugd/9e53d4_2622286b313940b68add66a25e6e137d.pdf
    • https://static.usrfiles.com/ugd/a0905b_4f425f5243b34a34889365e666290479.pdf
    • https://static.usrfiles.com/ugd/b85eb0_3f29d356ea5349578997fc3eb2e31c80.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_acfa49e65b59414a8da2afe28f7b93fb.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_off000090fe.bin
de139c9b6950fc7aa8b472b30203dd588f98f727f2f06370e10c98897e5d9dc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x90FE 5208 bytes
font_01_sfnt_off0000a29c.bin
eca867db02213ca0812c01499efea93ec4259f8caf4b415fad23976af45b8c2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA29C 10444 bytes