Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7cb73255158205…

MALICIOUS

PDF

32.1 KB Created: 2020-08-31 18:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d513a0677f311bebfd754c8e341a56 SHA-1: dcf97b7147638cc703974835424d9917f4c7dc79 SHA-256: cc7cb732551582051d6825ac499ee2bfcddad48ce49ae809913a212965532286
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One of these links, 'https://ttraff.com/wix?keyword=tremble+by+bethel+music', points to a known malicious redirector. The document appears to be a link farm designed to distribute traffic to various external resources, with a significant portion of these links leading to benign Shopify domains, but the presence of the malicious redirector indicates a malicious intent.

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.com/wix?keyword=tremble+by+bethel+music
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/vujonis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/neroguwebigozevanesepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9133/files/78929347934.pdf
    • https://static.usrfiles.com/ugd/c3548c_07b872b72cf746ca97b61dc520d046ee.pdf
    • https://static.usrfiles.com/ugd/0779a3_ba06e7bd14d14ee19a0f25de05a00acf.pdf
    • https://static.usrfiles.com/ugd/93c935_03489600a6484d1ab0886f20c9b6494e.pdf
    • https://static.usrfiles.com/ugd/ae15ca_deb966f6442b474caa30642d2e0999df.pdf
    • https://static.usrfiles.com/ugd/8cbfce_c3bee020d06f47eabae8f5fef5aa36a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_12e2901ca1c145948045ab55253cd9b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe4bb5b60d44115a28d07a42d7f2c23.pdf
    • https://static.usrfiles.com/ugd/221f3a_cb0bff1fe9924afeafe25278e64150e0.pdf
    • https://static.usrfiles.com/ugd/32777b_25c306d7855b4403a7cdd558e399bd0e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0457/6133/1356/files/vim_mac_cheat_sheet.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_off0000443c.bin
1ea1b35b1c55acc2a0e9287ae9b2e75f055da716bf343350036b0d1c2f7ed1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x443C 5020 bytes
font_01_sfnt_off0000552d.bin
cb341111e8c5f8150886a073a97df562c075eb3e11896a5d591da7e0640474e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552D 8908 bytes

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