Malicious PDF — malware analysis report

Static analysis result for SHA-256 daaeb1080800fa5e…

MALICIOUS

PDF

38.2 KB Created: 2020-08-24 11:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af5a7785cd9b5b84cd8beb84e99fd495 SHA-1: efd5671e9398e08ae1fad839a3d3fc988c919c60 SHA-256: daaeb1080800fa5e8946c8122a302c82567828d576502a9e3151272b38b43ae9
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it is a malicious redirector link, specifically pointing to a URL designed to lure users with the keyword 'mailing labels word template'. This URL is the primary indicator of malicious intent. The file also contains a large number of embedded links, many of which point to Shopify domains, but the primary redirector is the most concerning IOC. No scripts were extracted from this sample.

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=mailing+labels+word+template
    • http://files.lingxiangwu.com/uploads/1/3/1/4/131407802/ziwexapavigudugek.pdf
    • http://files.nwenergy.co.uk/uploads/1/3/1/8/131856446/beb49bf2f057834.pdf
    • http://files.meghwilson.com/uploads/1/3/0/7/130740493/zuditefifanavuxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/academic_phrasebank_john_morley.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/nebomamefavukufarivaburer.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/29916523101.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/69963688259.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0726/files/chennai_central_video_platform.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/vosenelidebesimodozuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/mivaniw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/sap_basis_certification_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/potential_energy_function_f_grad_v.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_off000059a7.bin
c30348ea968b547d5f06dc416eee963769e6c78b2e214df26a7d7cd6f81c38e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 5516 bytes
font_01_sfnt_off00006c59.bin
cb85c259a887de1ef221e558b3afda9d73cbf9991cb28083707134f336a2c8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 9400 bytes

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