Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1916b81e2ac3bd…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 21:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b328a6b714d49927ec3ddeb46613a7b5 SHA-1: 57b211ef27e36bf48c0a74dde877d91ea87f6157 SHA-256: ee1916b81e2ac3bdffcb9c20be893f6f4e4311e1040af782e86dddcfa77d3e56
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic firing for a redirector link pointing to 'ttraff.cc'. This URL is associated with malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm techniques used to improve search engine ranking for 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/wix?keyword=the+fat+resistance+diet+pdf
    • https://static.usrfiles.com/ugd/b8c837_f1c71de0f6774347905c42513b28b317.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbdc8e6b6902448cb83e89134be9ba4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a760784ec44c4ababad79a874c8bf760.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/fugoridifuxik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/acidose_tubulaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/poripekiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/la_dinamica_de_los_grupos_pequeos_p.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/gefowavuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/how_to_save_file_into_smaller_size.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/don_t_call_me_ishmael_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/96242880845.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/xomodepupowinabowakutovep.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_off000060ac.bin
a32fe0a4447e8dc3e6a44ecef28872170d1b420b55e3305a942eb5abb9cf7c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 4836 bytes
font_01_sfnt_off00007108.bin
49e7048d86a80e2371a69566f0e699351b30f94e7515cc5a2f97a7adf612ac33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 10228 bytes
font_02_sfnt_off000093c4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C4 4324 bytes

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