Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dbad98e32d80b3…

MALICIOUS

PDF

58.2 KB Created: 2020-08-31 18:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543308505a644d0cf4e6ebff23962868 SHA-1: 95d065d53ed13f9be1a36d8efb5fb49eab293c35 SHA-256: b5dbad98e32d80b353e5b47e50344c7b862567bf7299b2a2517929b64740854c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a significant number of external links, many pointing to a link farm hosted on static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a likely attempt to lure users to malicious sites. The presence of a visual download button further supports a deceptive lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=business+cover+page+templates+free
    • https://static.usrfiles.com/ugd/63d3ad_aeaeebcccd434f9d88b64e67785a4abb.pdf
    • https://static.usrfiles.com/ugd/8b97dd_17274531f0154720bfee802077f64471.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea274ce4b2c140c895b4c319e94a1caa.pdf
    • https://static.usrfiles.com/ugd/1f2646_193de7abd38b486193e3e5bcfd323f78.pdf
    • https://static.usrfiles.com/ugd/4bb894_2c8e6f352a0548828bc1bc40ecf5c1f1.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/83278753125.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/gosutilabebotape.pdf
    • https://cdn.shopify.com/s/files/1/0435/2573/4552/files/tools_for_formative_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/34394091057.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb28072733b24862b11105ec8d3431bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc37905c63864e108382a3c83f22ecf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_77f99552bd324721b20f93e892f0c36b.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_off0000a649.bin
ed7658d7760a481a4bcfc74dbc6b6e593f623099c210e52705def18b14a17984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA649 5444 bytes
font_01_sfnt_off0000b8cb.bin
70a2b8e8670bb21abe37261acbde0cb490ef1e824ed320d68d264f1ef392abb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CB 10248 bytes

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