Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd93c4e287b7595…

MALICIOUS

PDF

53.7 KB Created: 2020-09-01 12:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7674d9e1f2e6d16735e7a775241629d8 SHA-1: c769a54f65df7c2178b7a077bf6415988a6c411c SHA-256: 3cd93c4e287b759584bec3f50e93dd12c009229c5798ea6cfa677556dd5ba7d5
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through the presence of numerous embedded links. One critical heuristic firing indicates a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/wix?keyword=bukhansan+national+park+trail+map+pdf', which is a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, identifies a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0428/2767/7852/files/91329990409.pdf' being the first listed. These findings suggest the document is designed to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=bukhansan+national+park+trail+map+pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/91329990409.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/caldeiro_azul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/51249930297.pdf
    • https://cdn.shopify.com/s/files/1/0440/7014/2117/files/81851725518.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/dalaxuketa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/lowrance_fish_finder_manual.pdf
    • https://static.usrfiles.com/ugd/7baf93_641b07e5631b4ba3b4f9be946b6d1d67.pdf
    • https://static.usrfiles.com/ugd/6924eb_14f1c95eed01421eb88f1375d59620a1.pdf
    • https://static.usrfiles.com/ugd/451461_c5f55038b79e4565b8f4924490e1cd9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_381aa3bd863a4c23a4a420bf189cbeb8.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_off00006dce.bin
cf92d7900be569c9f0c0df0426e8cc4e9975addde2d3605174856b7653b9400b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCE 11384 bytes
font_01_sfnt_off00009382.bin
6800427dc2fd3ef5ea516b173222efd788d9864e5e0f914db9db0fe6cabe7efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9382 5396 bytes
font_02_sfnt_off0000a5b4.bin
ea6de832894b43d47b36eea3befea1183286b4d8c5ba0a7dead50dff8e186006		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B4 10388 bytes

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