Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6922e7264c995c…

MALICIOUS

PDF

38.8 KB Created: 2020-08-29 23:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8aba8567af8d5674c262244e9433597 SHA-1: eec2cb3aba80503ac1aa345b6b41cb49b42b4e44 SHA-256: fe6922e7264c995c8e8f3cae1c97cb89602f30a8c0830397e40dcf4cda37cedb
152 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=programme+de+calcul+avec+x', which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. 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/wix?keyword=programme+de+calcul+avec+x
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/senoti.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/rujadepawibivosidemufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/83203506088.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/66838330091.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/542489638.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6862/files/mapamundi_fsico.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/2423832541.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/xatubegafupoboruru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/xirakid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/origami_art_of_paper_folding.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/amphiphilic_block_copolymers_self_assembly_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/isometric_grid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/vatimoregipijegukutoduvem.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e47c7c7d1a6442d8ebdcdc9369fa4d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1ac3b661c8f48688e38482448d49d01.pdf
    • https://static.usrfiles.com/ugd/5438e3_570a55b9b78a4ac99486d14f0c3de5a2.pdf
    • https://static.usrfiles.com/ugd/09273f_4379e58e5f0946598c9f4cc23c86b8f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_24a2109d6d6a4ef2a82f3fb2642d547c.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_off000055d8.bin
e032f8a7ef6042cc996c9cb8164337191a3fd43914e493e52c249a778e3198d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D8 5208 bytes
font_01_sfnt_off0000677b.bin
899ec3af7d9a3357298fafcd7b5376d3361f98006d7d4579023aaeac9fb2b2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677B 11688 bytes

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