Malicious PDF — malware analysis report

Static analysis result for SHA-256 c564a7546848a682…

MALICIOUS

PDF

36.9 KB Created: 2020-08-21 22:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82633cde1848fdcfce2a7c65ecd3349e SHA-1: a07408d5d61bd29a8c9a4efc1a8f7667db086bd4 SHA-256: c564a7546848a68287d5984f4956d3cc7631c9862452e63f271f1e51c4465144
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=algebra+castle+learning+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file's purpose appears to be directing users to potentially harmful content through a deceptive link.

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=algebra+castle+learning+answers
    • http://files.treeservicekingsport.com/uploads/1/3/0/7/130775645/3780908.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://bakoxoka.living-from-love.com/uploads/1/3/1/3/131378776/tozoz.pdf
    • http://files.drsalessystem.com/uploads/1/3/0/7/130775921/visim-podadirapewus-xabumexun.pdf
    • http://files.ffipurelife.com/uploads/1/3/2/6/132695519/3b6290092ce.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/36297191285.pdf
    • https://cdn.shopify.com/s/files/1/0436/8308/6489/files/emulator_android_studio_error.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/ownership_structure_and_dividend_policy.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/lemidufutujakapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0484/6503/files/8547034057.pdf
    • https://cdn.shopify.com/s/files/1/0438/9647/1707/files/zadofaziwewomibuvuvizixud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/jisanugofazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/kadelivamibomef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/lazeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/16024417087.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/20271386398.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/87537166269.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/47799764233.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_off00004ea3.bin
37e76ae7ceb82fe7252d92a72dac39f5e85e4c1c0d5ca6141f23c05522f4407a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA3 5188 bytes
font_01_sfnt_off00006067.bin
7bf5d15123b426a2e1843a9a25d71140709a9ac81574f9dd203a0a803a1dd044
pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 11780 bytes