Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c310b7e99bdd10…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 01:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41738f7bbfd3a0bda41ac6ecdf29e4db SHA-1: 9cc925a87490f7dd87938cd3044ff0eae8241bd0 SHA-256: 79c310b7e99bdd1003daf3608cf92e1d45ff06eb385e45c0f60994b27c0c8ed3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and static.usrfiles.com. One of the primary links, however, directs to a known malicious redirector at 'ttraff.cc'. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure.

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=vals+de+rosas+thalwil
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/tuvozanokov.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/temorokizezifowij.pdf
    • https://cdn.shopify.com/s/files/1/0439/3166/4552/files/kerinanunew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/kukubek.pdf
    • https://static.usrfiles.com/ugd/b8c837_718fe999dfbf4161b05b24b2e5b4d640.pdf
    • https://static.usrfiles.com/ugd/c7a620_46714e234f1d4965a13301e6b741300e.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.pdf
    • https://static.usrfiles.com/ugd/b8c837_1649157441a143e9b41e4bcc65abc0a2.pdf
    • https://static.usrfiles.com/ugd/5de1df_91371358077c4d89996374818bd47557.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_e6a4910f23574ff59bb9867bd40cc6d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a47c3fb1ba4722bc4e3441bc62de3b.pdf
    • https://static.usrfiles.com/ugd/06497e_909b70d83700407c97f553034cf3182d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef79ffa8b2bd459dba57ba8c2b3dc69d.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bc9f02fb3f44690aa5f951b8747ba9e.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_off000068b3.bin
b4f14defdbcf730e3d95481d1e24f9624f668995df66abfcc8de648b5f48909d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B3 4968 bytes
font_01_sfnt_off000079a0.bin
4525f8fc1980aae7ed4ecce676d2e2aa8f0d24788577f74797fb87852a4ee8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 11232 bytes

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