Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d663ebba28fa6e9…

MALICIOUS

PDF

38.4 KB Created: 2020-08-24 09:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44b8f92b3ece0cadbead7f509904d935 SHA-1: 1122f7d0cbfcf9eda5428bc270c64d021a9cdd4f SHA-256: 6d663ebba28fa6e928a468c002da53c46f257719e55a664f865c8140ec0db665
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body also contains the URL 'https://ttraff.com/pify?keyword=3ds+rom+emulator+android', suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or content distribution network for malicious files.

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=3ds+rom+emulator+android
    • http://ziruxati.sharonscouts.org/uploads/1/3/1/1/131164250/puvapop.pdf
    • http://zexifega.afcptyltd.com/uploads/1/3/1/4/131437987/dunof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/lizuzowib.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/42762671204.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/bare_faced_messiah.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/new_passport_application_form_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/eclipse_java_ee_neon.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/koluxotapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/xoribasuwoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/aflatoxinas_en_maiz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b77.bin
e85f8391a9c0c6a710f0a2fe8758d1d265bb1c9e731a885f804a1ba96df3e7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 5040 bytes
font_01_sfnt_off00006c77.bin
43b647308fd24a43f9139b17a8f0a6b3d8320d064da12d5b5615069605375c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 9720 bytes

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