Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ef54fdbbe375b1…

MALICIOUS

PDF

33.4 KB Created: 2020-08-29 02:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4e3ae822f632b8e7bb106e57a3ba934 SHA-1: e68a8e21bfaa40fb8028aa31f65a17d7e21c0910 SHA-256: b2ef54fdbbe375b1acdd798bf3bb606f9dedab7c39d028218451bb25715f8afa
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc', identified as a malicious redirector. This link is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of numerous other PDF links hosted on 'static.usrfiles.com' indicates a link farm strategy, likely to improve search engine visibility and distribute traffic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cabala+pdf+gratis
    • https://static.usrfiles.com/ugd/b8c837_022ee43f2371415abf797dadcf72075d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c44355b17a9a412eb052019c4e340e18.pdf
    • https://static.usrfiles.com/ugd/b8c837_e886dd03e2974bdaad1bd37244012fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_942f2fbdf7a242c981bb776b108d2ab5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d39ec767d9fd401c96806e6af0641ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c718861d0aa42f28b8f31c7e3617d2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfe4b25bd3ae4f6299dd6680bcdcd65b.pdf
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ec49a0ee4824ad0905838b2e0b8662a.pdf
    • https://static.usrfiles.com/ugd/b8c837_59962bd600ad464d9eb0dc9e5e75b475.pdf
    • https://cdn.shopify.com/s/files/1/0462/6851/4453/files/monster_hunter_world_character_creat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/birthday_invitation_card_template.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_off00004559.bin
6be043271859133a5d4f2cde0408d52a232dd848f3f0dc9495d45480c9db547f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4559 5256 bytes
font_01_sfnt_off00005749.bin
af01985c2fb24b3b3837d3927ee93751fb8a7520f26cc2ea86bc1bf801b7405f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5749 10140 bytes

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