Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c790224cf4f6421…

MALICIOUS

PDF

38.7 KB Created: 2020-08-29 23:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ac3fe7711b5cd74883ee1d93c026bcc SHA-1: ecfa175f0986135ef1bfe991a24262761502099b SHA-256: 0c790224cf4f6421af1f2e2a2d95a408987547c5f09b45f68ed2a3e20461aac3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.club, which is flagged as a known redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting an attempt to drive traffic to potentially harmful content.

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.club/wix?keyword=kindness+is+cooler+mrs.+ruler+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c979b868ce22443eafdec2f13ef6215d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6107023b70e4a7ea57c0ffb23a090bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbbfd0603f3e4887bbdb92b5c4ab1d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_edeca505c90946eda64fe362c8d237a2.pdf
    • https://static.usrfiles.com/ugd/67e251_18e914aab87440588c178d90dc4c824c.pdf
    • https://static.usrfiles.com/ugd/db93e9_2c7567515f604567a319c414a89beb96.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d0e11fb6cf43d29792f026b4d63c22.pdf
    • https://static.usrfiles.com/ugd/1decf9_9fbbd13811944ad5aea52fcf1030d665.pdf
    • https://static.usrfiles.com/ugd/b8c837_17019950445d40e2b4290c7219e8af36.pdf
    • https://static.usrfiles.com/ugd/0d089b_68f2476301e943c49558b3d84752d996.pdf
    • https://static.usrfiles.com/ugd/b8c837_cda46ba4730747419bd7f9e1bb3a2070.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004085.bin
b11a210594cc35c89f6834ba74d418363db0ae8073d4d636fba421adcec93d19
pdf-font-stream PDF embedded font (sfnt) at offset 0x4085 8344 bytes
font_01_sfnt_off00005c52.bin
412006a552cc723ce29866223635fa857d389a59acc9684bd4578293f66131a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C52 5128 bytes
font_02_sfnt_off00006da1.bin
ee201c60d7cf460c310a808abc2fe179f6f683b3d77d47766ddf6695f70445f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA1 9652 bytes