Malicious PDF — malware analysis report

Static analysis result for SHA-256 091410559da9f162…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 19:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c650132f9bf81a63976f6d53c21fa5 SHA-1: 1a6d67321fb59ab187cbe7e36ca4cd01f616b185 SHA-256: 091410559da9f162fa7a09265e7c7fb91f60ebc100e296cca003ce7b4769c07e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.me/wix?keyword=bowmasters+hack+apk+todos+los+personajes', is flagged as a malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=bowmasters+hack+apk+todos+los+personajes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/078c79_e5a6938c5ebf4c9bae6542d5570aa642.pdf
    • https://static.usrfiles.com/ugd/b8c837_07761a20b169468d989b6dfce4f0a24c.pdf
    • https://static.usrfiles.com/ugd/96768c_31258b1184fa45f3af674985d0004a00.pdf
    • https://static.usrfiles.com/ugd/4725f1_5b50d55b447e45aeb3d6af89a606c338.pdf
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
    • https://static.usrfiles.com/ugd/3aca14_89284a9bb76c4e9cb41d7e8bbbb253b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7b4058e02c947d09a2cf0f90eecc184.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d5c77a6cbd8416198305a0d215f0e46.pdf
    • https://static.usrfiles.com/ugd/097bd5_c717888a62e34c7aa8c1ea61ebd3d207.pdf
    • https://static.usrfiles.com/ugd/79e5df_4b52d636a8d64f7b824cdb4666407125.pdf
    • https://static.usrfiles.com/ugd/516574_5da82191198d407bad932cefb84a6d74.pdf
    • https://static.usrfiles.com/ugd/b8c837_c63e815e773a4c7ea93a1fa3253f668e.pdf
    • https://static.usrfiles.com/ugd/f96b02_dec5a85e6a8741f998b052bd87b8b372.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_f81f1eeefa0d4204a48ee3a1325bb1b6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753c.bin
46a4ff66cd41d8e6acf89c35c61a3fb8040c2971df2e1ccf40885b9da5427285
pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 5596 bytes
font_01_sfnt_off00008826.bin
e97ae776f30e7cd57630755fcec65f846cbeba49732fcd9799a85f412106ba26
pdf-font-stream PDF embedded font (sfnt) at offset 0x8826 14932 bytes