Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdd996c7e193c63…

MALICIOUS

PDF

63.8 KB Created: 2020-09-09 01:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14b9c659986e6bd087395ef34fefe8b SHA-1: ed854beba72924b98426df1f1bbd64f347e4e66d SHA-256: 3fdd996c7e193c639b68c357290c3e26b9a021d79cc136593370e490e6040c02
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=alcanos+arborescentes+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of a large number of external PDF links, while many resolve to benign content, suggests a link farm or SEO manipulation tactic to obscure the malicious redirect. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=alcanos+arborescentes+pdf
    • https://cdn.shopify.com/s/files/1/0440/3009/9606/files/lukazumojugilewelus.pdf
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/61341810862.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/somokamukupalegol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/benelux_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/cambridge_key_english_test_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/art_basics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/8005/files/manual_msa_aiag_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/lois_griffin_tatum_hentemann.pdf
    • https://cdn.shopify.com/s/files/1/0469/3383/5931/files/intravenous_fluid_therapy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/tipicidad_derecho_penal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/54770434377.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_off0000b332.bin
899d95b73b31b2c02393d7ae7e5080ea68e1cec3d303aa17a9948f4c23c43a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB332 5276 bytes
font_01_sfnt_off0000c52d.bin
9afc233dacc2b93a06db3f5626f323ec4b700b729db2da691675a0457baba8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52D 14624 bytes

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