Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee496d15e89d4e2d…

MALICIOUS

PDF

45.2 KB Created: 2020-09-01 09:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0314fa51974d0c14b1a28cc1f20f5bec SHA-1: ae83a7ba92495cd294c98127e9b90e6203be0323 SHA-256: ee496d15e89d4e2d19af726e8b08e52952f78a5a682a00edeedb28f61fed081a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=gnossiennes+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs hosted on platforms like Shopify and usrfiles.com. The ML classifier also strongly flagged this PDF as malicious. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

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=gnossiennes+sheet+music
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/tumusegenaguruma.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/11145003698.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/65217921710.pdf
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/classic_shell_start_button_skin.pdf
    • https://static.usrfiles.com/ugd/696b8a_0e7b46cd40834308b00f0e896e7b5d62.pdf
    • https://static.usrfiles.com/ugd/b58d21_d6698a3682b0417b93f9fb530fdea463.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/9046542675.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/digital_electronics_textbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/8222245751.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/91748593063.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/15032010371.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/14929445148.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050f3.bin
f99402f1ed14923ae2a34de9d25596f62d6e633d0f28bdbd63f930aba2adf946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50F3 4732 bytes
font_01_sfnt_off000060f0.bin
bdd089d94ab5de6189a60c0a7352705ee08687da5b73cecf2e175b154d3b16b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 15212 bytes
font_02_sfnt_off000090eb.bin
73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EB 16120 bytes

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