Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ab75a66fd41b79…

MALICIOUS

PDF

48.5 KB Created: 2020-08-24 11:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd39290c68e7f9e140c7886655773dbf SHA-1: 3dca106da19f93c5439f6359a4586c10eee2843c SHA-256: 26ab75a66fd41b79d5f071d01dd912a32886887a49b620ca6515dbf150361db4
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on Shopify but also include a link to a known malicious redirector (ttraff.cc). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm and the presence of a malicious redirector are strong indicators of a phishing or social engineering attack.

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.cc/pify?keyword=intracardiac+masses+case+report
    • http://tixid.simpleeating.net/uploads/1/3/2/7/132740805/4161e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/us_street_address_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/iron_jawed_angels_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9551/4535/files/coliformes_definicion_diccionario.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/dokaval.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/haynes_automotive_body_repair_painting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/31301743780.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/24991130108.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/valiropoviminelezogewoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/tincaps_2020_schedule.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_off00006b28.bin
6219843d48084ba9ccdf54248ccef81f1a539dec4f93a64f461593b560682d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B28 5124 bytes
font_01_sfnt_off00007c6c.bin
4191be20a1f3cdd4ef274775d90a4080cb095b73556543ba7c565fbf8b21f98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6C 10412 bytes
font_02_sfnt_off0000a029.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA029 16204 bytes

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