Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5182a90916bf8de…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 12:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0db5c4bae3adf967495503b2ea103b1 SHA-1: fbf522796a29063241f3f4a724b1cc4ce908c2b8 SHA-256: e5182a90916bf8def66acad71144b960e1bd7cc54720a4faddea76f0e8fb32ac
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, likely for SEO poisoning or to host further malicious content. The ML classifier strongly flagged this PDF as malicious. The document body contains the same malicious URL, reinforcing its role as a lure.

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/wix?keyword=possessive+pronouns+lesson+plan+grad
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/69009279132.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/73259982416.pdf
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/papuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/ethical_hacking_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/xotatotedarakulilavo.pdf
    • https://static.usrfiles.com/ugd/b8c837_c808b6b09c1e45648afa93b61cb4a8ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_06a9dc8ef38e4806ba7a746ce811dd53.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/tonisisigesufatudew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/4000.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fd14edd0c424e399f80c1a2b0f6c6e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
    • https://static.usrfiles.com/ugd/b8c837_db3253c0efc7482b895a918465f5b309.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_off00006176.bin
17fc808a39b62f3c558bdf98a8d35f0691d42c01308483fdb700fe93f9389987
pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5188 bytes
font_01_sfnt_off00007332.bin
aef6559371cdaf578a443caae2fd032f50abf944d51f56fc6153d51b5815dbbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7332 11568 bytes