Malicious PDF — malware analysis report

Static analysis result for SHA-256 5533c9a3b0bba1f1…

MALICIOUS

PDF

44.1 KB Created: 2020-09-05 20:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e22014de477e0d7c701b1dc5c5664f SHA-1: f7e79a61fb608243c1c5fcf0b87352c2214d2d40 SHA-256: 5533c9a3b0bba1f12fe78ccff1882e98d33e48049939e24e5b510be93ca4ff29
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.club/pify?keyword=coinbase+pro+android+app', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'Coinbase pro android app', suggesting a lure to a cryptocurrency-related scam. The presence of a large number of external PDF links, many hosted on Shopify, further supports the link farm tactic.

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.club/pify?keyword=coinbase+pro+android+app
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/gluconato_de_calcio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/sipex.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/waruwume.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/service_level_agreement_example_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/gefisipuxugo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/beechcraft_baron_58p_poh.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/16007058293.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/jigixawuxixitofav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/xedegavuviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6531/9324/files/buwiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/naboboxetejabu.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72bf1bb1da8404abea58e9d5f721bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_9548bc96a7074bd3b6b505c4f8f6eca4.pdf
    • https://static.usrfiles.com/ugd/27135d_18814de8075b4661b54d6a4076f07de5.pdf
    • https://static.usrfiles.com/ugd/60933b_dc435a3f8bb6415ab3e6e01f08ffbf10.pdf
    • https://static.usrfiles.com/ugd/455f95_781a02ed7ff3454399676d210daf7bfd.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_off00006ec3.bin
4f2bfe9fc25f27d48658417b823f410812d6714680d38c01bc4260909da3c605
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC3 4964 bytes
font_01_sfnt_off00007fa0.bin
be507a502c9f97b0754506f6a5ba85d308b9ad1d17d21dbfa62a27c6e641b77b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 10572 bytes