Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cd8a9687932ac0…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 18:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 831a65ad257e723d2b4f67cc9f2c42db SHA-1: ee72d7e82a1dceec4b78da8c444f128b2dd3eea3 SHA-256: c5cd8a9687932ac098913480570b35d4126e0b85ce49224b032a283a545fb966
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The primary malicious URL identified is https://ttraff.ru/wix?keyword=watermark+remover+tool, which is flagged as a known malicious redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=watermark+remover+tool
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/exemplaire_certificat_de_travail.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/budget_and_budgetary_control_mba_project.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/multiple_alleles_blood_types_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/pedatitifogil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/63951115637.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/amicon_filter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0294/5959/files/69410566725.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/definio_de_atmosfera.pdf
    • https://cdn.shopify.com/s/files/1/0465/9521/1429/files/mC3A9thode_rose_1C3A8re_annC3A9e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/83405076691.pdf
    • https://static.usrfiles.com/ugd/dcfb95_8172b140899146929bea6e711a094bbc.pdf
    • https://static.usrfiles.com/ugd/105a8c_65bae2308789462a8e8f4ba164256196.pdf
    • https://static.usrfiles.com/ugd/d55797_fe536d57cceb442ebb2416cc4aee2839.pdf
    • https://static.usrfiles.com/ugd/eda9ba_16a7f1a8f26d43d08ff4c0a516dc7776.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/dosozegulosofelepubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/wabokemazuxujagop.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/26849933515.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/3289942185.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/nivitumuwumipuxinipumaboz.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/
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/nivitumuwumipux

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006461.bin
8b12d24e887636abcb67c783ee57bb9bbe2be5cb238df5a86760e16ee5184df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 4792 bytes
font_01_sfnt_off000074a9.bin
0957d83a316a85820e8a5fe927748a30f27c00dfff32f5482fef490e2bec6258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 11252 bytes

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