Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5a667ee11cf50a…

MALICIOUS

PDF

50.4 KB Created: 2020-08-30 04:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 431dc3aa3ae5dca1e940e8823be08313 SHA-1: 1bab7fce570d36db6b9e92a63bddc375d4ebf711 SHA-256: 3b5a667ee11cf50a9a091de675faccde79967eef19e9e6b585f256a125037e54
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading a 'test de raven' and includes the malicious URL. This suggests the document's primary purpose is to trick users into clicking the malicious link, likely leading to further malware delivery or phishing.

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=test+de+raven+completo+descargar+gra
    • https://cdn.shopify.com/s/files/1/0432/7522/3200/files/29175899707.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdf
    • https://cdn.shopify.com/s/files/1/0432/5087/6578/files/10721612840.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/models_of_language_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0440/5559/3110/files/80240682453.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/a_chng_ta_u_l_i_sc_lang.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/absolute_rulers_of_russia_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/palliative_care_guidelines_north_east.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/727255209.pdf
    • https://static.usrfiles.com/ugd/88a84f_a4a69e5b8b8644b1a0a8086108f7f715.pdf
    • https://static.usrfiles.com/ugd/b8c837_790f5b5790084de09fb769b98c727ceb.pdf
    • https://static.usrfiles.com/ugd/e643da_0cc7a822c01e4adfa1e737a9cbdd8036.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_off00008696.bin
ae5444447d7a93f07e57d80f646dcf27053280a21145b656ed178a20de1dc3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 5404 bytes
font_01_sfnt_off000098e1.bin
78c0eee25d3ec2e374110901f3efffcd5c400da9bf740ba15d9ce59156be9c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E1 11236 bytes

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