Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57ab4d08d497c99…

MALICIOUS

PDF

41.2 KB Created: 2020-09-16 23:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fd442c589188fd8f080e63491114250 SHA-1: 8a326819fea44f3f7cf62aca399103024ea29bb6 SHA-256: a57ab4d08d497c99f7648ae0d3ab67260e14081953a48811f85881ac5477b2a4
120 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.club/wix?keyword=un+mundo+para+julius+descargar+pdf+gratis'. This indicates the document's primary purpose is to trick users into visiting a malicious site, likely for further exploitation or phishing. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted, but the embedded URLs are sufficient to determine the malicious intent.

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.club/wix?keyword=un+mundo+para+julius+descargar+pdf+gratis
    • http://mogedowe.grappletv.com/uploads/1/3/0/7/130739069/wusolefuluj.pdf
    • http://zilepi.buyonlinesui.com/uploads/1/3/0/8/130874376/9523149.pdf
    • http://files.pawsforacauseinvitational.com/uploads/1/3/0/7/130776757/fb88d43440.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/gizuzinapavodozimux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/91484783339.pdf
    • https://cdn.shopify.com/s/files/1/0462/4488/8730/files/muwofifotox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/vavirik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/59857152894.pdf
    • https://53158e27-af54-45a4-8792-4bf9b6c94d37.filesusr.com/ugd/733c1f_9f51cf4e85c94b74a277199f14f068d5.pdf?index=true
    • https://1452c071-f6c1-43f6-90a6-0ee0afe39398.filesusr.com/ugd/6f5f23_b99a49aa7af5495f9cd5792969846cf2.pdf?index=true
    • https://bee4ac06-291f-441f-bb81-a403a65caeb5.filesusr.com/ugd/d2759c_f25156541dbd4e33bfec42cceb2c5e96.pdf?index=true
    • https://b371eb4b-5f51-4e4a-be79-89b896354690.filesusr.com/ugd/145364_3342c36e248a4f4fa087accd834e7adc.pdf?index=true
    • 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_off00005d89.bin
349204d3534f8a461141edc7306d2c2a5d8d39ba1d72bbdb060df6faba9c65c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5540 bytes
font_01_sfnt_off00007056.bin
00fc61edb83d2aba1324cc9bb68bc6f9e5a81f8e6341ca2cb1ae5ebc7be47775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7056 11584 bytes

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