Malicious PDF — malware analysis report

Static analysis result for SHA-256 300643b4d91a12d0…

MALICIOUS

PDF

42.5 KB Created: 2020-09-16 14:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003dcc2dd584e2751ece8cce22a8821c SHA-1: 13d545d8c11555601ce564ac609303458aac45db SHA-256: 300643b4d91a12d08944dcbe40b49b580fc583447838b99f4f33607d25a32f36
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of embedded links to other PDF files, suggesting a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious.

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=graph+of+a+water+bottle+balloon+lung
    • https://21f027f9-b5f7-4470-9fef-8ec77d8d1f55.filesusr.com/ugd/d5415a_024ee92748c24a698d0de5e0da0a4a05.pdf?index=true
    • https://3bb8e9a3-afdc-4bc6-98da-bbe232d3a13f.filesusr.com/ugd/8bf3fc_a0256fc49d1243d0abc0052fe03cd454.pdf?index=true
    • https://924d4470-39eb-4dcf-92c6-7e85b09604c2.filesusr.com/ugd/33ab24_3604d69d1aca4f74870f49b840e3af57.pdf?index=true
    • https://fd031e9c-2430-4e50-ab13-b22f204edfd7.filesusr.com/ugd/65b209_90ac8f1e7e2442d6a9d8b8ea4c25c2b3.pdf?index=true
    • https://3d7d24aa-142d-4dd4-9436-5c17ddd0cbdd.filesusr.com/ugd/3ed902_d279033596604201bebdba632a4b7f94.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/869482226.pdf
    • https://474bc2b7-7c93-497f-a2cc-71493b8ddc3a.filesusr.com/ugd/33ab24_a27a889e38554549bb87e033af03279c.pdf?index=true
    • https://a74e7e29-9c3c-4d10-882c-87356c630731.filesusr.com/ugd/5bb01c_930112759c6943a59f55245cd3cf8a41.pdf?index=true
    • https://6e0a538a-c332-4a01-9a31-3f0431ba1fea.filesusr.com/ugd/011e4b_75ac6ffabf964129bcc97ec27cb1735c.pdf?index=true
    • https://cf5e1cb3-eb9c-4654-ab14-786af26157a7.filesusr.com/ugd/0fdb6d_874bf76ccfd74e8c9f55f20452fcc2dd.pdf?index=true
    • https://cc4bad58-f38b-41cf-8489-fa723ae2f433.filesusr.com/ugd/bc0b97_97ef151659084ddc88645ecd76d955b0.pdf?index=true
    • 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_off000068e0.bin
961b50f8f69e3ed3f9b68419b074d23d53c453b1fee1be7247782e76ccafb29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 5248 bytes
font_01_sfnt_off00007ac9.bin
e45db3377afa3dbeb43d1a7e33c77c054af4480ba47bc1abaea730bce0e278c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 10168 bytes

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