Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9b84b78452c9d6…

MALICIOUS

PDF

44.1 KB Created: 2020-08-26 23:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeca68391a16422123e90e0b62c60356 SHA-1: 51913c9c66b16740436e317e2f13930eba97992c SHA-256: bb9b84b78452c9d632a6d1e078eec7c2e0290b40967042ad7c3007a7308818d4
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'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which are hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to potentially harmful content.

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=physical+chemistry+thomas+engel
    • http://kafizema.lokaltogo.com/uploads/1/3/1/0/131070841/biterafidilot.pdf
    • http://files.clovercaredoulaservices.com/uploads/1/3/0/8/130874192/44258c1fdd872f.pdf
    • https://cdn.shopify.com/s/files/1/0463/4240/6305/files/team_member_introduction_ppt_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/2176675292.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/distinguish_between_basic_and_applied_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/fuginukebidufukabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/junior_business_analyst_job_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/lasuvumekakulezitiwabine.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9207/files/surf_report_haleiwa_oahu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/35439371839.pdf
    • https://cdn.shopify.com/s/files/1/0433/6510/5814/files/new_dmrc_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/carbonatation_du_bton.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0318/files/bubodajaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/breath_holding_spells_treatment.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_off00006f0f.bin
aaa1928aae9571886e4b288a026925b1b314495bc56b01047d0890d52fbdf532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0F 5316 bytes
font_01_sfnt_off000080f8.bin
c14b9dba04b6f4fe1dcfbbe09e5c27bb68c2b220f0778b8bdbe04beeccd8443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F8 10088 bytes

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