Malicious PDF — malware analysis report

Static analysis result for SHA-256 becd839f0481175d…

MALICIOUS

PDF

50.7 KB Created: 2020-08-12 10:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8141002ca1556be7601dc0e3da9f7b0f SHA-1: 09336ea0af9614a48408a939082545f4f204bec8 SHA-256: becd839f0481175d498563e5abff35c74dfa38038c88c34eab8edcc506baedce
120 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 `https://ttraff.com/pify?keyword=payroll+management+software+pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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=payroll+management+software+pdf
    • http://nalofe.sledgedistillery.com/uploads/1/3/0/8/130874254/556984.pdf
    • http://files.globaltesoltraining.org/uploads/1/3/1/6/131606965/9821aee.pdf
    • http://files.nosilafacepainting.co.uk/uploads/1/3/1/1/131163691/7c03361774665.pdf
    • http://files.lauracbucci.com/uploads/1/3/1/4/131413678/minanugasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/33596443650.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/8374887146.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/18025387819.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/python_simple_https_server.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/pathfinder_bestiary_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/sudetunajijafisif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/77644044513.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/pokemudumasawenabigaxoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/feguzagudu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/wumunud.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/runovujenet.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_off00007dd4.bin
a9a23c1e2afd3d37521378bdc8bd180c43083be1a06250ec390e988ca3ef1fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD4 5556 bytes
font_01_sfnt_off000090b0.bin
7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 2268 bytes
font_02_sfnt_off00009ac0.bin
4f18c420dd105a18c54c1ccbf60e4b54ca286622e675f0030756d31f551c4065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC0 10224 bytes

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