Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59aaadfaa803e56…

MALICIOUS

PDF

42.1 KB Created: 2020-08-01 20:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac0cf973ac4366828028e490366552f SHA-1: ef4ebace50867a0d5ee89d58a1b57ed8d69c79a4 SHA-256: a59aaadfaa803e562dd541c2b0d73e50f40a83e7789947d04c4a3918d5f8e9d4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=league+of+legends+file+size, suggesting a lure related to game file sizes to entice clicks. The presence of numerous other PDF links hosted on Shopify domains indicates a coordinated effort to distribute malicious content.

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/pify?keyword=league+of+legends+file+size
    • http://files.modebylauren.com/uploads/1/3/0/9/130969986/soxalelis-nasodevomoj.pdf
    • http://files.diamondheartsoflight.com/uploads/1/3/2/8/132814476/4518572.pdf
    • http://files.careersatadviceone.com/uploads/1/3/1/6/131637136/a6bc63bde.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/31079270118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/tipeduwanedureg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/vejoxomorobisigokaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/mokunaveg.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/rovamazatomunagowan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/51892451705.pdf
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/99505572314.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/classic_hunter_talents.pdf
    • https://cdn.shopify.com/s/files/1/0431/6790/8004/files/lesanujowaguvapeduwosud.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_off00006835.bin
c8dcba1c5bb8584d523a97210ad90ca8dc89c1acffa7344b97cd734b5f0e6703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6835 4968 bytes
font_01_sfnt_off00007945.bin
f342496ff9da3465c8d1175326aa1d07b22c6046a61d294e53f5440cb0d6896e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 10192 bytes

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