Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c6a43c21fb9ead…

MALICIOUS

PDF

34.9 KB Created: 2020-08-23 05:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bcd7e4f9e4055089573975e143ae7a7 SHA-1: a8793dcaedfdaddb6d863592063b6c626e3b9996 SHA-256: a6c6a43c21fb9eadb108328c6e8be1d910162406c4fc691d7d19104ff2cce13a
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though partially corrupted, contains text related to 'free guided reading activities year 1' and a URL that appears to be a lure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The presence of numerous links, including those pointing to Shopify domains, suggests a link farm or a method to obscure the final malicious destination.

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.ru/pify?keyword=free+guided+reading+activities+year+1
    • http://files.mahajosh.com/uploads/1/3/1/4/131453456/ravixokugiguwom_womutezenufino.pdf
    • http://defoxaju.mgetsinslp.com/uploads/1/3/1/0/131070152/9945765.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/mibodesimujetugiso.pdf
    • https://cdn.shopify.com/s/files/1/0438/3172/2141/files/44419261615.pdf
    • https://cdn.shopify.com/s/files/1/0433/9200/8357/files/78701217754.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/adda52_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/4454647870.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/excel_2020_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/chevron_phillips_chemical_company_llc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/how_to_record_discord_with_obs.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/savabufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/bright_futures_12_month.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_off000048b9.bin
1b5561ff869c13924c3ff9f7222f7b7b18ac3bf8077272b863b9babfa74c9ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B9 5244 bytes
font_01_sfnt_off00005ab1.bin
104bfa06f5a82719900543e775c4f7f7e766c1165469ce7eb6ea7706e1159817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB1 10628 bytes

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