Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3e1efbd184c00b…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 06:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffdeafe2bf082248c0badf78181a2b2 SHA-1: f20dbcb84f079edd833cc624bbb8b1931b7ae518 SHA-256: dc3e1efbd184c00b0f1ccff202bd0dbdde7c0cfe60e6aa92f238c94e808f7086
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=rappel+anatomique+de+l+oeil+pdf
    • http://files.pilgrimsresttea.com/uploads/1/3/0/8/130813988/kojizavol.pdf
    • http://files.providence-ca.org/uploads/1/3/1/6/131606133/sirukezabina.pdf
    • http://files.niumanatreecare.com/uploads/1/3/1/4/131409090/nebupoju.pdf
    • http://xowuren.ngabwe.com/uploads/1/3/1/4/131437601/6400345.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/25221633857.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/59039381536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/to_selena_with_love_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/gasajorunamanixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/93938369422.pdf
    • https://cdn.shopify.com/s/files/1/0433/4406/8773/files/sevafiwimapilofov.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/defakega.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/44173324169.pdf
    • https://cdn.shopify.com/s/files/1/0434/8873/9494/files/pebadov.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/75880660380.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/84787054724.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/vufobewapefa.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_off00006dec.bin
1ec18779982401dc857680bb5b0fbf9b7ebeb18623c1b1aa24fda0625b1cad98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 5044 bytes
font_01_sfnt_off00007f0d.bin
77bd70f388e0b3e6e95546c13c524440afcca3765a2b502c907324c9e007332c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 11332 bytes

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