Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb7ecde39efc450…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 19:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8c3e28ff0f31065948a74ee7d9313af SHA-1: ecb3dae0c2ff056b4e9619a26a02e6ac95be56d8 SHA-256: 5bb7ecde39efc450c4dbcaa893a769270c5bc9f1e01aacee565c7d454adf9b74
154 Risk Score

Malware Insights

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

The PDF contains a link to `ttraff.com` which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous other PDF links, many pointing to benign content, indicates a link farm strategy, likely to improve SEO for the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=main+hoon+na+full+movie+watch+online+free+dailymotion
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_eede28d44e994ed8ba76f8573931113b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d43b6ec7328043178df670c7166d41a8.pdf
    • https://static.usrfiles.com/ugd/3826db_0db24bc629d047698c46ec482a7c0319.pdf
    • https://static.usrfiles.com/ugd/b52961_312d3a2de20449c4a82743c693bf274b.pdf
    • https://static.usrfiles.com/ugd/b8c837_335e42b09e474ea6aae944e6a41eac6f.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3521/files/functionalist_theory_of_stratification_davis_and_moore.pdf
    • https://cdn.shopify.com/s/files/1/0431/8760/1559/files/69795120120.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/teriruvumibubor.pdf
    • https://static.usrfiles.com/ugd/b58d21_63d493fca621401686a8eeb9151a591d.pdf
    • https://static.usrfiles.com/ugd/f46427_4802a83f92714063b301ac0e4b6bc8c6.pdf
    • https://static.usrfiles.com/ugd/fe83c3_5116d0f555ab4668af934570c1c82a63.pdf
    • https://static.usrfiles.com/ugd/1be480_f4da168a64a443ab897d877ae5d671e7.pdf
    • https://static.usrfiles.com/ugd/2c608b_a9ad985104c54416b53b7508791304e1.pdf
    • https://static.usrfiles.com/ugd/a18aa6_a559f13366b44523acd53d648e1f0377.pdf
    • https://static.usrfiles.com/ugd/b8c837_40a264a103e64c16a2228599a11d33e9.pdf
    • https://static.usrfiles.com/ugd/51c472_8c17c3e0404440cfab0832f156be67da.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fbd.bin
db4f492ffbc122a70b9100b927d4e83fd0f15474baff226178f8b8ac0777cb60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBD 5224 bytes
font_01_sfnt_off0000616b.bin
91957240687d9977bac3ac43ece08e9a8544d948fb7a129067cbfba96bcecb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 10536 bytes
font_02_sfnt_off000084a2.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 16164 bytes
font_03_sfnt_off000099bb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BB 4324 bytes

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