Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f782f3c1b1153c…

MALICIOUS

PDF

35.8 KB Created: 2020-09-08 22:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4942d61b9f089d4e78d9620ce6aa5b SHA-1: 94dd79de8258125e74f372c4753388e0b1a1df7b SHA-256: 82f782f3c1b1153c5f41d931f97bd73cbfac8b326e07b1d2c738ac5856ef53d9
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=bazigar+novel+pdf', which is likely intended to trick the user into downloading further malicious content. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic.

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.club/wix?keyword=bazigar+novel+pdf
    • https://static.usrfiles.com/ugd/f4de5e_5b004a65ab4e4bf083d5a5c3672eb5b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_205fb915f4b944ec9970dbbaa2acd521.pdf
    • https://static.usrfiles.com/ugd/f90bad_ea2b57559c084df09a8776af6a1269ba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0437/8673/1681/files/new_audit_report_format_2017_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/64912161099.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/77295996513.pdf
    • https://static.usrfiles.com/ugd/db1da1_5b607e301d0844628c8617531f2dddb9.pdf
    • https://static.usrfiles.com/ugd/bc0d1e_8f253c15d0f142a6b0eb938994b9213c.pdf
    • https://static.usrfiles.com/ugd/d01287_58b408099e38436da8feb0293e4a9d91.pdf
    • https://static.usrfiles.com/ugd/bd1c09_7fddeed220144af2bcc48a8db4015482.pdf
    • https://static.usrfiles.com/ugd/8cbfce_e4fb85bf86a84f5fa03ae7c1cc2a388e.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_15df5d1f04c64b8885cf19ea412af3ba.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_9290bc757c2740f6a93794625991eb2e.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_off00004e36.bin
d1b74428a58b8083d0d89098bccc43f417dbb370c2159c0a3739105b7118680e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E36 5188 bytes
font_01_sfnt_off00006003.bin
ce11f01a7d001db97b8582860d6c8a416d2a8029fa807da05e70dc648409658c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 9796 bytes

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