Malicious PDF — malware analysis report

Static analysis result for SHA-256 af11aa05444e3da4…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 12:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10a3cc12b4b0026a94c6e2a233856296 SHA-1: b3122f93e2ef0b1022fd54baaf4426339048778c SHA-256: af11aa05444e3da4cd75cb93f8504a27cfc98844275567eafb0dabb801c084ea
152 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it was identified as a PDF link farm, containing numerous external links. The primary malicious URL, 'https://ttraff.cc/wix?keyword=kangoku+senkan+premium+box+how+to+do', is the most critical IOC. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=kangoku+senkan+premium+box+how+to+do
    • https://static.usrfiles.com/ugd/b8c837_f63ba92fd3d3488db5a8c617a3ff6671.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe40e38292f54e0294d160a648e170a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2762b56172ef4ef8bb40c865dfa9f22b.pdf
    • https://static.usrfiles.com/ugd/b8c837_36350c2d29ef4ed4b7ae912bc8d282b8.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/77661235.pdf
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/study_bible_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/sistemas_de_control_automatico_kuo_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4461/files/99308580416.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/b._tech_final_year_projects_for_cse.pdf
    • https://static.usrfiles.com/ugd/b8c837_03a38d3ee55f42c0881c854eeebf817f.pdf
    • https://static.usrfiles.com/ugd/b8c837_73c01e9f6fc3485c9e71736f766de4b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_caaba8d62c9f49278d45ca32e7757fe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1cf448b6cbc46a68b31134152d4f845.pdf
    • https://static.usrfiles.com/ugd/5b604d_8bc675e72165416a9767cb967ef268b8.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_off0000441d.bin
84c51353ecd0be5f979a8fe8d6aaa6e28b144464f91f8010cff67b23b055965e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x441D 4492 bytes
font_01_sfnt_off000053ab.bin
32115a1e6635b0830cd7051bd363674a116fb0db4a7840d2b59d9e3331c4c801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AB 5676 bytes
font_02_sfnt_off000066e3.bin
8e23a95b110cffc770a430049d7411545dc96ce6b0c5a3b26c36dd164ff65e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 9520 bytes
font_03_sfnt_off000087af.bin
2727b978b38a50f39ad898ebf475f8e8b5e599e3ec01ea6686db683a475b2ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AF 16088 bytes

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