Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a893583db672690…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 20:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ccb248539fb10a43cbdbdaf92ce20c SHA-1: eb44742ff5ebf839ffbd497c001dfb6a0a455963 SHA-256: 3a893583db6726909e1749f03e9dc025fa95378a9a41788dd1951bf6ee0fa938
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a tactic often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. One of the embedded URLs, 'https://ttraff.com/wix?keyword=the+school+barthelme', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous links and the malicious redirector suggest an attempt to lead the user to a compromised or malicious destination.

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.com/wix?keyword=the+school+barthelme
    • https://static.usrfiles.com/ugd/b8c837_ac906ab6db68407e91c2fe143e45bde9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://static.usrfiles.com/ugd/a4d998_7f201bdd23654cafa9c989dd24967835.pdf
    • https://static.usrfiles.com/ugd/b8c837_439ca287ba404a629e4fd1e99a16ca19.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/kazidawilewoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/importancia_da_analise_swot.pdf
    • https://cdn.shopify.com/s/files/1/0428/8203/9964/files/92079141190.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe34ca5882194272a29bb2c5dab30fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_473f823dbb494547bd505fd72b2eea48.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ab7b7970844811aeeabe7b5dd323dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_179209e83ce24ee09f428c79ba82157d.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/62754443942.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/maryland_commissioners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/57609974990.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_off00006309.bin
3a616e6720b3fd0e5883c358d3742da59f8b50821d2ad2ec4e1af28187e52a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5128 bytes
font_01_sfnt_off00007452.bin
9ddc667f5dc495eb09419ca49ff340b2c6549f7043eee70b2e18d04b594df208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10024 bytes

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