Malicious PDF — malware analysis report

Static analysis result for SHA-256 443c399b3d57d2cd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 23:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e20eb5db6dc6277e5c6a77502f3ea9 SHA-1: 5ef492b3cd58e15590768b66be99812bc3e15913 SHA-256: 443c399b3d57d2cd2919ed1f1e27887f220a55938a7880f063752eb1400e6b45
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=bhagavad+geeta+pdf+hindi+download+free'. This URL is presented within the document body, disguised as a link to download the Bhagavad Gita. The PDF also contains a mass external PDF link farm, suggesting a SEO poisoning or link farm tactic to distribute malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=bhagavad+geeta+pdf+hindi+download+free
    • https://cdn.shopify.com/s/files/1/0431/6758/0317/files/furawunerudawumunuvuxemif.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/spatial_data_analysis_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/55324394255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/tabopolagubaxurutemagox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/53229616726.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/brchen_addition_und_subtrahieren_bung.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/paralegal_billable_hours_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/96219911795.pdf
    • https://static.usrfiles.com/ugd/158fb9_e77eee8d77a84eccb81024e8ca057f6a.pdf
    • https://static.usrfiles.com/ugd/a64c8c_69c0122eddd84d958bb5b147d5507197.pdf
    • https://static.usrfiles.com/ugd/de65f7_f438876db8554509a405996353ae4a92.pdf
    • https://static.usrfiles.com/ugd/de60da_662f696707d643bca13c3cc5751cabf1.pdf
    • https://static.usrfiles.com/ugd/0d2908_aad829afd2f4466ca16c3afb1254c955.pdf
    • https://static.usrfiles.com/ugd/f65518_c3c6322fec144399aed2e060bbd187bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe32f41167d64790aa6cbf2f5ab06d77.pdf
    • https://static.usrfiles.com/ugd/b8c837_a932183e82f7499681b2072342856939.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_off00005dc7.bin
1e5d596e7b534f2fc368e9e95865c3f4071a5ea412c5e0e07ecf836e7e11d933
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 5328 bytes
font_01_sfnt_off00006ffa.bin
33ce0e0b620ec84578aab4726758a866187d6fb9ac750d0b226677ad15b5116c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 9856 bytes
font_02_sfnt_off000091b3.bin
f68683585135546df7df345a7ad2eb5fc2671808619c80b96df8dd60bc999bba
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B3 5644 bytes