Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cee30ced18d9af…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 20:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5935be23fb16993a516311707d677c2 SHA-1: b51670dd8649670a067befd9e8f2a06b7c51703f SHA-256: 76cee30ced18d9af5eda4df1dc014db2a5baed72a12e007c914ec83b82400648
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service (ttraff.cc) which is flagged as malicious. This suggests a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains the malicious URL and other URLs pointing to Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=assembly+language+beginners+pdf
    • http://files.theorderoftheoak.org/uploads/1/3/1/8/131871864/donurudegisezodi.pdf
    • http://files.flatlandscustomtackle.com/uploads/1/3/0/7/130776533/baxirulovidab.pdf
    • http://files.eurekailchurchofchrist.com/uploads/1/3/1/1/131164081/e20ab.pdf
    • http://jutulawu.mainewoodsbaseball.com/uploads/1/3/2/6/132681504/mabedusopik-zotebatevizu-rakumipawu-weliguzik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/wefixabezaxesawap.pdf
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/anemia_normocitica_normocromica_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/10323080515.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/gusipizeruwafozalusem.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/nififuvusegaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/28112223220.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/90607161731.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/31748204741.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/lotuzusovuxoxominorin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7140/5222/files/past_simple_past_continuous_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/phonics_sounds_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/nimujisanajoratesila.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.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_off00005fc2.bin
e6c7ed301b686d0abf883056c45842d0ea837cc31897d47bdac2d03c2ea4118b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5592 bytes
font_01_sfnt_off000072b2.bin
bb6188a4c1dce44f2d5455e1cfc977d7cf21f5ba674362450012cb02e81da11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B2 10000 bytes

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