Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc67ca5e8db0987e…

MALICIOUS

PDF

43.5 KB Created: 2020-09-02 00:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41149a63619bf0be46684f04418176f0 SHA-1: 5b2dd4cadf09c253d1a916e1bff007669cf0f907 SHA-256: fc67ca5e8db0987ea066caa05cb589aff162db4a02f409e550e1b4794f6e8187
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute content. The primary malicious URL identified is https://ttraff.com/wix?keyword=estar+present+form.

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=estar+present+form
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/79439595238.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/play_store_card_game.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/77898923008.pdf
    • https://static.usrfiles.com/ugd/6812d7_f36e822af4254f3eafbdc885ff7e3bba.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc31f4d6b524514a431ef7b2747371e.pdf
    • https://static.usrfiles.com/ugd/3eed2b_62adb7a68a0545818d79ba9080576bbf.pdf
    • https://static.usrfiles.com/ugd/902d29_2d11130d100b4760aeb507a827b0c838.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/26404161192.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/60248797816.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/55932752292.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/learning_advanced_english_vocabulary.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_off00006489.bin
6cf24971751c5ee1443e974fa20ec8234adf40da9a8c28f21b7c02c6b9f54811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 4972 bytes
font_01_sfnt_off0000755f.bin
07fe276e4dc251966a356229cea8e73ca6a6765721827196db56a4bc64cc3e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755F 13976 bytes

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