Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1729814f4848f75…

MALICIOUS

PDF

82.8 KB Created: 2020-08-20 10:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e7c3f609cb7df25674e676eef91f41 SHA-1: 18089c63dcde901fb2e3092eed6a4f804521d944 SHA-256: f1729814f4848f755a6bb4746bb6af02a4b497059bb33f0ba1d4ac295593cf89
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm and a malicious redirector link, indicating a social engineering attempt. The document body, though heavily obfuscated, contains the malicious URL 'https://ttraff.cc/pify?keyword=guidelines+for+central+line+insertion'. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document prompts the user to install something, likely malware, and the 'SE_URGENCY_LURE' heuristic indicates a common tactic to pressure users into clicking malicious links. The presence of numerous benign-looking PDF links on Shopify domains is likely a tactic to blend in with legitimate content.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=guidelines+for+central+line+insertion
    • http://vevopode.donchurropilsen.com/uploads/1/3/0/9/130969723/xovugaxefepilat-jipaz.pdf
    • http://files.obmath.org/uploads/1/3/1/4/131406337/5360631.pdf
    • http://files.wasmwallabies.com/uploads/1/3/1/4/131438059/3169940.pdf
    • http://pugod.demclubwicomico.org/uploads/1/3/2/6/132683097/zakupas_goromitizozukip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/lu_factorization_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/82721748136.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/bejadezeki.pdf
    • https://cdn.shopify.com/s/files/1/0428/8525/1235/files/55995840458.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/1786467741.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/osrs_skeletal_wyvern_melee_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/lasogub.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/alexitimia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/budgeting_system_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/8554264674.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/xejudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1712/5536/files/hinduismo_y_budismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/96276646142.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/pawodijogonufu.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_off000107f8.bin
c3922b329e5fb2e2836cd303db7c2a042db0be8bc36a22db135e79872a6e62c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 5044 bytes
font_01_sfnt_off00011921.bin
e8f6252a58ae4f3f217d8db4acac80b504b4ed0b5d82384e37404285bbf1f17c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 10816 bytes

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