Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48438051b01ea50…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 05:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9969dc75658338103a23a54170eb984e SHA-1: 132ba17ce60fd629044d9df25efdd6d6d514a640 SHA-256: b48438051b01ea50744aee086a543e9534a72d320dd5cd4130c52b4be98ec732
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, including a critical link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=super+mario+flash+level+codes'. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=super+mario+flash+level+codes
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/morukixosorojosizavasaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/xamowiwudajaberusofura.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/61945300978.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/chinese_alphabet_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/muvitexim.pdf
    • https://static.usrfiles.com/ugd/83f04e_c6265df45c864e66bbc3bb7ea284a87c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6453/files/samajubusuvasiteponunezod.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/apollo_greek_god_facts_and_information.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4485/files/bujawitu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/activated_sludge_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/66548680241.pdf
    • https://static.usrfiles.com/ugd/aef5b7_a2e24bbdfbf64c72a3581e3e0c2ed099.pdf
    • https://static.usrfiles.com/ugd/b8c837_62c97950fe74456d99ab08edf9c2ddb4.pdf
    • https://static.usrfiles.com/ugd/7c30af_e0842840144744398a0022e8a4fbfd7e.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_off000042c6.bin
51e4fb541d401135d17c14661357818848403344f1151cfd95e449c0e75de1f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C6 5556 bytes
font_01_sfnt_off00005588.bin
6b7e8bf33e0d61315c1f43b09cd6df9152892aa06b2744b19080fb5f333cc11d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5588 9836 bytes

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