Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dfd9a5f8bccb4c…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 23:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70abfce4d04e675493eb94554f1adff0 SHA-1: 9f0e83b2804aa8079c03772a31036f9c283e183c SHA-256: c2dfd9a5f8bccb4c1624882e8fced971d45fe5b12cd52765823a6be470d99c86
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the string 'Vault bypass app free' and the malicious URL, suggesting a lure for potentially unwanted applications or phishing. The primary attack vector appears to be directing users to a malicious redirector.

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.com/pify?keyword=vault+bypass+app+free
    • http://kapij.cardiganbayregatta.co.uk/uploads/1/3/1/4/131438096/cdc3b3557212d66.pdf
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/wajizudinetofili.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/38484473908.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/23458744652.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/dedelegapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/conversions_worksheet_physics.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/93805671792.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/edward_maya_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/instagram_mod_apk_onhax.pdf
    • https://cdn.shopify.com/s/files/1/0463/7773/0209/files/microsoft_dynamics_ax_training.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/78199124295.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/houghton_mifflin_math_expressions_grade_5.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_off00005ef7.bin
72d6098cb920063cf8111fddf3b9c2db8df161da977798155ac490e764adf7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 5104 bytes
font_01_sfnt_off00007067.bin
387033f60452fe5220b9159556c60732e1a53dc0a9415393fb1af93cc9a31a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7067 10196 bytes

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