Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8f186e4cf31f1e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-04 01:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae313445ac7e55e9fa87bd2c570dc0a8 SHA-1: 7cd5b3f3e635a21a1ea5ec40bdfc882a791b8fc6 SHA-256: 8a8f186e4cf31f1ebb5d1c139bd7b010fd92c910c2322a9a09c27ad22f9a0903
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be redirecting the user to malicious infrastructure.

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=short+functional+text+exercise+pdf
    • http://files.d-hunt.com/uploads/1/3/1/4/131453588/e022258ac75.pdf
    • http://files.peaceseedslive.com/uploads/1/3/1/4/131452858/zerabirovezufedomogo.pdf
    • http://files.robertoster.com.au/uploads/1/3/1/4/131407183/a0754241267445.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/89013148627.pdf
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/taxavov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/grade_11_chemistry_textbook_ethiopian.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/zobitamolun.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/muwusilifuvoruxadet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8781/4044/files/85493980698.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/tipasuginopapen.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/bullwhip_days_the_slaves_remember.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/19479664381.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/mojigulibebojutupexubulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/96649354679.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/xonunamadukigowojorak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/pojelodo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e99.bin
0c267c3a8ea705197dc248ce010d2b358d582fb9da0c22c6b0ba0a8568791aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 5416 bytes
font_01_sfnt_off000070fc.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 1800 bytes
font_02_sfnt_off00007989.bin
dca1f57049394e8145be2ce8c2b914b34f8c7d6f38a6ba7b246de13bf542f1f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 10748 bytes