Malicious PDF — malware analysis report

Static analysis result for SHA-256 0036acd57a5e78c9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 18:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e31026a69ea21b72b64b59899a5bd4 SHA-1: 1a9803189316f130e9bf537b271a8418480afd24 SHA-256: 0036acd57a5e78c94b981cb0d58b7b944c9d4542b72fdc350b653dd4b651332f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=osha+lockout+tagout+template'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=osha+lockout+tagout+template
    • http://files.iroiroproject.ch/uploads/1/3/0/7/130740586/fujililetujun.pdf
    • http://rilolamew.sdesignsgraphicarts.com/uploads/1/3/0/7/130740013/jovakigijun-mibasufosu.pdf
    • http://donaf.performancedobermans.com/uploads/1/3/2/7/132740905/xelipir.pdf
    • http://files.sharitavonsikphotography.com/uploads/1/3/0/7/130739470/892586.pdf
    • http://files.veganslovegluten.com/uploads/1/3/1/8/131871518/ruzopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/poulan_chainsaw_fuel_line.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/notepad_html_formatter.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/3_idiots_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/differential_calculus_formula_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/39718208340.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/6324697379.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/57093409315.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/babebajiwaxejowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/migokurejalaliverowadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/82832072335.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/biasing_techniques_of_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/canon_ip7200_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/2568/9758/files/2016_toyota_camry_xle_owners_manual.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c1.bin
e4ddfe2f75cc4f743fab97059173bb95d6458859adcf2c1c966822e118e3fcbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 5340 bytes
font_01_sfnt_off000072cf.bin
78723a540f60542414499809f9d982e381270579c8a58dd540f72ce3eb103432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 10008 bytes

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