Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e01be209438943…

MALICIOUS

PDF

127.6 KB Created: 2020-08-10 08:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3e751f2087503753b724f7c2bdbc20 SHA-1: 237e0e4ab1262984cb78cd4a7fa49cd57984e804 SHA-256: 27e01be209438943dea1523d4fcbc80d0b66e7b4b783faeaebc6f1727dcbb51d
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=clinical+pharmacology+pdf+notes'. Additionally, it exhibits a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'Clipboard command execution lure' heuristic suggests an attempt to trick the user into executing commands, likely related to the redirection chain.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.ru/pify?keyword=clinical+pharmacology+pdf+notes
    • http://kimivo.stokegiffordscouts.co.uk/uploads/1/3/1/3/131379312/b26c4375e146bd.pdf
    • http://files.themcdonaldsbook.com/uploads/1/3/1/3/131381910/4f7da3797d63.pdf
    • http://jozade.prime-peak.com/uploads/1/3/0/7/130776487/mosimudosa.pdf
    • http://files.wograce.com/uploads/1/3/0/9/130969270/xukajipefotufi.pdf
    • http://gefedo.evasimmons.com/uploads/1/3/0/7/130776208/kagelokiso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/50460292872.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6288/files/chemical_formula_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/contaminacion_atmosferica_libro.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/systema_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/33230981810.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/tugowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdf
    • https://cdn.shopify.com/s/files/1/0439/4034/8059/files/john_deere_110_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/55078899906.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/rukanifaluloxitapapax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018914.bin
402e3ae2d74b72c83f33a6c034e00405c4678b29c1d22538de7ef69118255454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18914 2104 bytes
font_01_sfnt_off000192db.bin
97c83982290f519f23ba918133a81e0bb081a8e21a7543432c27dc76ab7114de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192DB 5576 bytes
font_02_sfnt_off0001a5ae.bin
38710acbcfe9eecbce36ff862e7621cc6705a93f4cde23d93f22c7e4702e19e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5AE 17396 bytes
font_03_sfnt_off0001db9f.bin
ec82203d095110bc7b25dc7c08d780bd3ce5ac91834c2264f58ca73ac31eb382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB9F 16164 bytes

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