Malicious PDF — malware analysis report

Static analysis result for SHA-256 decc0eebf01469d5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 12:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63155452be2b942417bffcff58dd6118 SHA-1: 4acbe9d7806a3154ce799d505ac022650fc7bb98 SHA-256: decc0eebf01469d5949fd58bddb2609be6989f03b9bb9302e24eb7314eb3c94c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is designed to lead the user to further malicious content.

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=data+structures+and+algorithms+with+javascript+o+reilly+pdf
    • http://files.sandlotdublin.com/uploads/1/3/1/3/131381722/ae228a5382.pdf
    • http://files.cbcareermanagement.com/uploads/1/3/0/9/130969306/xojupopek.pdf
    • http://files.birdsontheniagara.org/uploads/1/3/1/4/131453028/firivokesaxamax.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/66717702810.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/92436378840.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/vaxofanapiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/borderlands_2_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/kijejuvawitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/susefijulejinubajires.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/54537807318.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/statistics_mcclave_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/xelekevikenuvove.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/raxulegafilamokikogomun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057d8.bin
a21213d0d156b5f63bc7d936cf1c1d2951185ecffd478a6698c7e673a349a97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 5780 bytes
font_01_sfnt_off00006b73.bin
1bc94af8ea0ee19923e70cdecfb4d8db9c16c8132098e985a07cf39d4298fda8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 10168 bytes
font_02_sfnt_off00008e43.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E43 4324 bytes

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