Malicious PDF — malware analysis report

Static analysis result for SHA-256 00578a56a8d241ef…

MALICIOUS

PDF

95.8 KB Created: 2020-08-08 12:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da88daf62455ceb7d5f8e5e8ba830937 SHA-1: c7f499fdb1c2d47085c821aa2e710593328fed29 SHA-256: 00578a56a8d241ef49346fbb014aac5384b9d3412046af78f36293623a29e4ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'roots suffixes and prefixes pdf'. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious infrastructure.

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=roots+suffixes+and+prefixes+pdf
    • http://mirufom.outlandscorgis.com/uploads/1/3/2/7/132710621/wozodeloz.pdf
    • http://files.lesswastelaura.com/uploads/1/3/0/8/130874067/3914765.pdf
    • http://files.chaplainsinternationalinc.com/uploads/1/3/1/4/131483371/kogotolawek-musipagewezujod-topizarenonasez-gabibuxusovesa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/xitubiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/70023404812.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/rafolovupepijenuxukupijak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/runuvosotojepukimilat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/88376072071.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/pdf_to_word_macedonian.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/battlestar_galactica_order.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/definition_of_waste_management.pdf
    • https://cdn.shopify.com/s/files/1/0450/0871/5940/files/tell_about_yourself_in_interview_for_freshers_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/mathematics_books_for_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/25737704982.pdf
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/vijolipozix.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/39121943733.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_off00011df5.bin
820feed1bebc1fbc093dbfb16ca351608a4f72663f287f11f062e70c18eafac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 5076 bytes
font_01_sfnt_off00012f59.bin
0bad8c8a9fd3409ecaa782f397755c30888dc3eac1fe8d1478ed251335edf79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 27228 bytes

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