Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbee4d713f524b4…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 00:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4968354ed226d9fdc97b1ae0823afc11 SHA-1: 028412dab1e9f07f60c23b466c699bdb4396fcc2 SHA-256: fcbee4d713f524b475893884a917ee4173b57511d2c396c4dc9d412a60d02c96
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to a malicious site via 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.ru/pify?keyword=chromatography+organic+chemistry+lab+report
    • http://files.twinappliancesinc.com/uploads/1/3/1/4/131454808/631236.pdf
    • http://files.countrychic.shop/uploads/1/3/1/3/131380558/889196.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/wopunapujudijodomil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/tenupujalobetulabozorog.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/61027853070.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/blended_learning_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/94472899176.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/63354703354.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/numpy_one_hot_encoding.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5456/files/mowawakevigoguka.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/physical_and_chemical_properties_of_alkanes.pdf
    • https://cdn.shopify.com/s/files/1/0452/4553/0274/files/the_biggest_loser_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/25871841803.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/neumonia_atipica_en_nios.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_off000062a6.bin
956f024a72f67aa0b58bc66226bccd7db753fe03ec8dd655d8254e2b47931fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 5496 bytes
font_01_sfnt_off00007533.bin
96ff1c87d0686768245cf02f07756bdf119fac43d2178322838cb6d4a90d6544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 10104 bytes

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