Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed4be3b54987175…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 20:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d55958218dfe0fbe6e3004c41d75d4 SHA-1: cf020b00fc7f30c2676d2864428171ac9dfb8a9d SHA-256: 1ed4be3b5498717553ba3b90553b8e2fd98b82618e714e85c7a4f2a0c2925fd6
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/wix?keyword=forward+declaration+for+template+class', is flagged as a known malicious redirector. The presence of numerous links, including a malicious one, suggests an attempt to lure users to harmful sites or manipulate search results. No scripts were extracted, and the document body was heavily obfuscated.

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=forward+declaration+for+template+class
    • https://cdn.shopify.com/s/files/1/0437/7519/7346/files/11850169512.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/electric_field_inside_a_ring.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/84463911373.pdf
    • https://cdn.shopify.com/s/files/1/0462/5966/7095/files/92142581339.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/sudojamuvone.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/gosen.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/16983073439.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/56036151065.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/kb_to_tb.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/buzejonoxuvutemazekulutef.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/9690587073.pdf
    • https://cdn.shopify.com/s/files/1/0462/3676/2272/files/notas_musicales_en_letras.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/voresoronumolipomuvadisaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/53051595169.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/93307420042.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_off00005dfc.bin
476d694c4a142cec2e8700abae1ab481fe1a40fda96784bbb97dbd940a581072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 5348 bytes
font_01_sfnt_off0000702f.bin
1103087e12cfd13c3ffe69d2cc74569d41d70188f94ab643c5e7f4e5848e3244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702F 13444 bytes

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