Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0bc75a83b78e49…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 16:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef31cde4802a835bc51c49ef8bdd0bdf SHA-1: e95252e32a14a8658dae2a1517bc7f24513c86a6 SHA-256: be0bc75a83b78e4922332eef926d468f21e565b68cd1083446948fd6c7566d87
152 Risk Score

Malware Insights

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

The PDF contains a link disguised with 'Danganronpa' keywords, which redirects to malicious infrastructure at 'ttraff.cc'. The document also hosts a large number of links to other PDFs, likely for SEO poisoning or to spread malicious content. The ML classifier strongly indicated maliciousness.

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.cc/wix?keyword=dangan+ronpa+episode+2+english+dub
    • https://static.usrfiles.com/ugd/b8c837_042bcdc01125418b8b193e4ea30b423a.pdf
    • https://static.usrfiles.com/ugd/fd30ac_237d9ab2e2df45d7b58066db9e486cee.pdf
    • https://static.usrfiles.com/ugd/e42ee3_e6d518e09ec0425db6f482790aa75eb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7bd45308a040af9b29010b968ec1ce.pdf
    • https://static.usrfiles.com/ugd/3f80ec_5ade4bccbad243dda110f0d3b8b74706.pdf
    • https://static.usrfiles.com/ugd/6908d7_43e0e0b65d0345aa9dda4be8268ddc02.pdf
    • https://static.usrfiles.com/ugd/b8c837_aabc427c43f2495bb4eb577199b2d6a7.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/antarctica_political_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/7226/6150/files/xazafiniwewijepud.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_c321eb9e55a74b059989d3672f3fc7df.pdf
    • https://static.usrfiles.com/ugd/865d50_abfc76c72e754a279f96251629ee1bdb.pdf
    • https://static.usrfiles.com/ugd/f46427_7fc310177f3a4f569e0cf4565bbfdcd5.pdf
    • https://static.usrfiles.com/ugd/26481d_160b4a549a094bedaf41f975b2299096.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b0978d96f8c45b39f765347f84a02ea.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_off00005012.bin
5e9dcfe34f4a48640516a6961220a022161b0122fea46415a3a66c112fc8c1b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5012 4156 bytes
font_01_sfnt_off00005eb6.bin
23742c63f4fe349a1e187fe7e440322042ad9e94866380b32154e4d89ba9ebf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 5492 bytes
font_02_sfnt_off00007151.bin
0ae59853be5baa7400dd7cdc0da9102f1ff4ef176d60e2c307587f59ca295661
pdf-font-stream PDF embedded font (sfnt) at offset 0x7151 10060 bytes