Malicious PDF — malware analysis report

Static analysis result for SHA-256 c200a5ca974b02d2…

MALICIOUS

PDF

44.0 KB Created: 2020-08-28 16:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a24582085c57b36d8b9b6d2f41e4d7dc SHA-1: daab3f891ea05f76907b26949eddefe2c9d2ba56 SHA-256: c200a5ca974b02d279db9553c3a343f80a8d9f7c4bfaf88a1b3f95b9f6c53a14
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, 'ttraff.link', which is likely the primary malicious payload delivery mechanism. The document body is heavily obfuscated but contains the redirector URL and several other PDF URLs, reinforcing the link farm tactic.

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.link/pify?keyword=astroneer+small+fabricator In PDF document text
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.pdfIn PDF document text
    • http://files.drlouiefrodriguez.com/uploads/1/3/1/1/131164394/fafavemudokiw-ravikoxa-bigepojepaw.pdfIn PDF document text
    • http://files.milltownmonitor.com/uploads/1/3/1/0/131070588/2452102.pdfIn PDF document text
    • http://files.poolsofblessing.com/uploads/1/3/2/6/132681488/fited.pdfIn PDF document text
    • http://files.journeytomichelin.com/uploads/1/3/0/7/130775393/gisubamelorotosino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/71779748069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9602/2933/files/cateterismo_vescicale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/81618857396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9622/5432/files/laliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6899/5222/files/diamante_poem_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/54624364463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/zizowap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/14923370251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/50619103082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/komaretenef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/23454427621.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eb0.bin
2c776003e3c849ccd143dc4d76ec77bebb7b32c6af62af4e1b3149c6b80770d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB0 5156 bytes
font_01_sfnt_off0000801f.bin
d45a69370d99cb368cb6900366c301e51f115b6e7a517d63d21635f44059e68e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801F 10280 bytes

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