Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae9ce71601d361c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-10 14:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c60f6dae76444a9914603dc5520226 SHA-1: e792ab55bd468f6f6a9366573a43e2832d29e918 SHA-256: 1ae9ce71601d361c4e7f50631e595c4b23c88e5080101c43cf41e3b7a8e9dd30
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'. This URL is presented within the document body, disguised as a link to a 'balance sheet analysis ratios pdf'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

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=balance+sheet+analysis+ratios+pdf
    • http://files.tribalnationsmaps.com/uploads/1/3/1/1/131164476/8451578.pdf
    • http://files.permastoneinc.com/uploads/1/3/2/6/132681827/5105379.pdf
    • http://samakexi.kiddirama.com/uploads/1/3/0/8/130813528/gufukelowizos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/18934146660.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/31259379498.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/occupational_health_hazards_among_healthcare_workers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/dinisamidoju.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/wugegukesalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/73317852660.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/84533021127.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/37155731333.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/11725405483.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/tepiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/vonokepajenorule.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/
    • https://cdn.shopify.com/s/files/1/0439/2773/237

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f8.bin
97d20159ae3d56508d4916670f65b7e7f049b1290b5209a9738a07e2f8d90e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 5396 bytes
font_01_sfnt_off00008741.bin
c9c09d275104b76a1cfbbdfe019880185c6f20478edb7e20973c4d0d4d312232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 12384 bytes

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