Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e3af669fd0523a…

MALICIOUS

PDF

47.0 KB Created: 2020-07-29 08:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd76d5da6c92a6943ab2c014510cdde SHA-1: 6dd95e8512adfea23f42309919d712c2f6f01324 SHA-256: 02e3af669fd0523a74cfa87315c9aecb18f26dec44e8ce5c45dfe6018a165586
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented within the document body as a link related to dermatology, suggesting a phishing or content-luring tactic. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cutaneous+lupus+erythematosus+dermatology+pdf
    • http://files.grinerdrillingservice.com/uploads/1/3/1/4/131407029/pofasoru-dupesufiwogar-zuvumamotejow-jasen.pdf
    • http://files.kaylahmarieartworks.net/uploads/1/3/1/4/131453985/newufalotinebin_duborupaxu_dutifob.pdf
    • http://files.apimm.net/uploads/1/3/2/6/132681969/gijadilixuregi_bikorifalilub.pdf
    • http://files.aifby.com/uploads/1/3/0/9/130969674/9d77d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/88413334102.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/potamevanikogibogemukos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/tufujoruwefifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/tojelitefepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/74160842027.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/gotilipetuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/1994/1541/files/joluditemibatekutawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5409/files/gibavuvarupaxutanufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/70298695486.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/32941085751.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/79613476781.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a6f.bin
11ebe7f8288457c4f439d06c4564263639d30a048dd4632ab5d15daef7cbc141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 5412 bytes
font_01_sfnt_off00008cba.bin
b4d2a381dc313fa55a2bc033862b56f8df2d12dfd67fb803ca12a3980a3ed819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBA 10024 bytes

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