Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db5572073a57f4a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 21:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23478724fc4e8f98f506e5eec65bd3c6 SHA-1: 7cb0feccdf2e1b0a016c810ddbb3af8a808bdf86 SHA-256: 2db5572073a57f4ae8b92b1d3b27a7bdfc9c36f21975a1815b9196d3e942dfd1
154 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 'https://ttraff.cc/pify?keyword=renal+diabetic+diet+recipes+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious or deceptive content. No scripts were extracted, but the embedded URL and the nature of the link farm strongly suggest a malicious redirection attempt.

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.cc/pify?keyword=renal+diabetic+diet+recipes+pdf
    • http://files.vivastrangeboutique.com/uploads/1/3/0/7/130776069/fipivejabe_fetixe.pdf
    • http://files.andersonoverheaddoors.com/uploads/1/3/2/7/132740249/pezimujuxizeverewo.pdf
    • http://files.photographybyemeliadeweese.com/uploads/1/3/1/3/131382148/0d3c4e2635.pdf
    • http://files.simplicitylawnandgarden.com/uploads/1/3/2/6/132695620/9995481.pdf
    • http://files.armstrongsinvestigators.com/uploads/1/3/1/6/131636807/f5f99027.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/76225346158.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/barusasufokekevidamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/salary_slip_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/19540253151.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/48556530719.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/4726947975.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/46840234396.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/38273078503.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/45407601307.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/57517412869.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/bugox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/acute_bronchitis_2020.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_off00006a85.bin
6b2fe382f58fa8d33352bbe0beb2acc6e791a51be32764990fc201cf1cf1fed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5296 bytes
font_01_sfnt_off00007c97.bin
2fd9a9895d7b20d523b725572273ad54b1d855a965bfb993249bfa60563d30d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C97 10204 bytes

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