Malicious PDF — malware analysis report

Static analysis result for SHA-256 5621ae1e1a915856…

MALICIOUS

PDF

45.9 KB Created: 2020-09-17 02:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f1e021a7fe8a949e56c4b32d8be641 SHA-1: d0ceb525f865e71da756f844c2999da651cdf323 SHA-256: 5621ae1e1a91585699c184ed483bd40c777c907c91ef244095fd16e1ace2734b
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a form, likely intended to trick the user into clicking the malicious link. The presence of multiple external links, including a malicious redirector, indicates a phishing or social engineering attempt to lead the user to harmful content.

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.link/wix?keyword=ucla+ap+readiness+media+release+form
    • http://fetonenij.yorkriverpaddlechallenge.ca/uploads/1/3/0/8/130874384/938481.pdf
    • http://files.laurapowerdaviesartist.com/uploads/1/3/1/4/131453682/kizeluwuvusipovevar.pdf
    • https://d0b01334-36ac-4c57-830e-e57185da24a8.filesusr.com/ugd/f515ca_3a92f1ccb13d4870b67a07033adf54c0.pdf?index=true
    • https://f58ee9ec-5caf-4c52-b19e-e21ddf03850a.filesusr.com/ugd/bb10c5_e846ac54aa4144fa874c33e84fe79fe3.pdf?index=true
    • https://4c47522b-ddcf-4550-b1ba-5e8e89b34843.filesusr.com/ugd/61567a_2585a5c5ed77446caa0d88a9ee8679a8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/8469/3160/files/83489583315.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/microbiology_of_biogas_production.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/adderall_bula.pdf
    • https://7cd09b1e-59e6-4cf7-bd41-6dd543906ac3.filesusr.com/ugd/062c90_24b6515d010548ae933d53da608fba51.pdf?index=true
    • https://cb35c8e9-be74-4194-934c-ea9d001dab08.filesusr.com/ugd/429b25_58363d4433d546e0a17c7021c6caa9fe.pdf?index=true
    • https://193be36c-276d-4462-9a3c-2951978203a5.filesusr.com/ugd/9ea91e_66be1cb0efef46599b475fd6847af688.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a6.bin
1214012fff7b1bc8d7e02f346aa3b4528377116c4bbb26766283327762f8d7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A6 5000 bytes
font_01_sfnt_off00007781.bin
019d6f69d8194ad5ac25814709c6634d3f39ff115ae8a4d595c4129228e86075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 10912 bytes
font_02_sfnt_off00009cdf.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDF 4324 bytes

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