Malicious PDF — malware analysis report

Static analysis result for SHA-256 9512814b4fe8ba17…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 17:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85be765db5614e4b1112700206fea824 SHA-1: d31efd6b649f3c6f53e6d8927a9406c7d833015b SHA-256: 9512814b4fe8ba1779eaa37fc73096f877bac46a25222acb076e7cd0d1e30767
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=what%20is%20formwork%20pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, which is characteristic of a link farm. The primary intent appears to be redirecting the user to malicious infrastructure.

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/wb?keyword=what%20is%20formwork%20pdf
    • http://gugizewub.sierra-remote.com/uploads/1/3/0/8/130874426/lejewifagi.pdf
    • http://files.mrinjectorparts.com/uploads/1/3/1/4/131454172/leverix.pdf
    • http://files.mistressmorgana.com/uploads/1/3/1/8/131871556/6191560.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/41563121624.pdf
    • https://cdn.shopify.com/s/files/1/0453/3986/9339/files/anaemia_in_chronic_kidney_disease.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/9168583942.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/woragulobuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/navabolulib.pdf
    • https://cdn.shopify.com/s/files/1/0435/8691/2413/files/cambridge_english_business_benchmark_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/carcase_for_hounds.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_off00006037.bin
06d75d78dbcc8101db94d34b616638d48b60c50513488600bfade5874b1ac0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6037 5420 bytes
font_01_sfnt_off00007297.bin
ed2411cfc73ee38ee46f5ae90649a2072cee33895f4b7da4af19ebbd4474f5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 9768 bytes

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