Malicious PDF — malware analysis report

Static analysis result for SHA-256 47907346c7a9306a…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 07:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc8681693d110fae74e671782c7a2857 SHA-1: b33add5e15ae8837e9ffc3158dc86ebf1c9a4afa SHA-256: 47907346c7a9306a82e3415b8259417b7a8351a6e53604ec4f6aab3227dc13b8
152 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 indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=funeral+invitation+template+pdf', suggesting a lure related to funeral invitations. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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=funeral+invitation+template+pdf
    • http://files.wildthymeflowers.ca/uploads/1/3/0/8/130874541/mabetiviker.pdf
    • http://files.kingfisher-strategy.com/uploads/1/3/2/6/132681916/9238505.pdf
    • http://files.mindnutritionbody.com/uploads/1/3/0/7/130740551/nepodatufojuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/75801018633.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/lepibanubakijude.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/75531258299.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/zekopebilajoti.pdf
    • https://cdn.shopify.com/s/files/1/0435/3468/0216/files/vapidezokewixodutowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/busurogixik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/26219296916.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/bank_po_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boruxunijutaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/mokugekisaxutox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/wafalofawaredor.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_off0000677f.bin
be00ec1e3d95885e89f8c5cf6ddea83d17279ad13be8496e721a6934bdefd487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677F 4904 bytes
font_01_sfnt_off00007814.bin
b68c3db14d5094b6d0777038912a4f9d20da8644787ebddb781651fd2ad92ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7814 9984 bytes
font_02_sfnt_off00009a3f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3F 4324 bytes

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