Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df6e204f9ca0e51…

MALICIOUS

PDF

39.0 KB Created: 2020-08-18 23:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c408db9b89c615a2d92357d3e6e46a08 SHA-1: 1cd9838ff1e33b105124f44bc891e867a2859ab7 SHA-256: 7df6e204f9ca0e513fc3759e224e157aa2267c9cc23dc9dbe45bbf546e76fa77
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link to 'ttraff.com' and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The document body contains the same malicious URL and several other Shopify-hosted PDF links, suggesting an attempt to lure users to malicious content through a deceptive link farm.

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.com/pify?keyword=narasimha+tamil+full+movie++tamilyogi
    • http://files.eltandhappiness.com/uploads/1/3/1/3/131380666/zurobikumewedo_bupipodinik_lurisalurogupab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/77830340420.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/20455705579.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/www_notdoppler_comn.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/vozapazitases.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/52493223059.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0973/files/11050043636.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/outsourcing_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/10212475784.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/64310952528.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/turasizusifekare.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/lejupugavixipekagonulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/learning_autocad_plant_3d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/49382787330.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_off00005941.bin
0621f100eda22258c2c02983470e144998f37e974fa4f009891b7894d5851352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 5312 bytes
font_01_sfnt_off00006b43.bin
9514f1499162ed3f1d2668cb52de3f1d62bf496f5f1bbccb9c5812477abf3d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B43 10552 bytes

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