Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d568a817bfe396…

MALICIOUS

PDF

84.0 KB Created: 2020-08-20 21:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55e6eab9dc69295b4a4626df846ef0e3 SHA-1: 362c413d853e389e8096f1d9b6f1649338c0f3c9 SHA-256: a7d568a817bfe396661928f022441e0ff7afc77a2f360ef070840240fd5a06d1
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, with the primary malicious URL being ttraff.ru. The document body, though heavily obfuscated, contains the string 'carbon sink definition pdf' and the malicious URL, suggesting a lure to a malicious site.

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=carbon+sink+definition+pdf
    • http://lofelavi.cog7denver.org/uploads/1/3/2/8/132814476/877a88.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/auxin_biosynthesis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/74642708808.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/kezetoxunevukilirimuzavog.pdf
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/cambridge_certificate_in_advanced_english_2_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/4102865377.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/94313483251.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/ridowogabipaxobus.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/antioxidant_activity_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/lubukinidis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/likibojogowajuvoluju.pdf
    • https://cdn.shopify.com/s/files/1/0438/4201/1293/files/brand_awareness_questionnaire_sample.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_off0001030c.bin
1cfb4dd7798f0f12427cc9574c00a701aab6cc8a9d5e4365515218365aa1b30d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 5112 bytes
font_01_sfnt_off00011478.bin
c06e3cacb977cfe5a33f1a826086bb5300b7c1780f32e5ab474c7e32df7d407f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 14952 bytes

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