Malicious PDF — malware analysis report

Static analysis result for SHA-256 964e92d9888f89ce…

MALICIOUS

PDF

40.3 KB Created: 2020-08-02 18:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3c8a97d5a16a394102859ee4d16fa88 SHA-1: 4c2916c3ea39bc52d9d1dff09ea217f1e6831d02 SHA-256: 964e92d9888f89ce234a0cf91ad972b91e8461beece6ecca7fcf6281d1b09768
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=minimalist+osu+skin'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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/pify?keyword=minimalist+osu+skin
    • http://files.mr-stevens.com/uploads/1/3/0/7/130776864/zoxakaso.pdf
    • http://files.bablithreadingsalon.com/uploads/1/3/1/3/131384070/6190705.pdf
    • http://files.superjumppartyzone.com/uploads/1/3/0/8/130814877/tiboli_dumafugezalebam_gekosibajaxo_xejoxizofukozav.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/45532669694.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/44953013405.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/vemetawaxivuvibupujojan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/60410281660.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/razer_chroma_world_of_warcraft.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/fundamentals_of_communication_systems_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/55335253093.pdf
    • https://cdn.shopify.com/s/files/1/0439/9159/7214/files/23790921237.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/xejizotufogewabagebi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/meluboloxati.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/vewepifeluxeru.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_off0000607d.bin
ce6d86643b4b3e1c6aad9a6d8847dfa403e7150e35d6299ec5a92eddf468f5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 4804 bytes
font_01_sfnt_off000070c9.bin
f90379aa2b002dcaeca5c4d17f3fcfe10c9b4cc46b18142f883f479f4d768e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 10464 bytes

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