Malicious PDF — malware analysis report

Static analysis result for SHA-256 6203ad6b63ff977d…

MALICIOUS

PDF

44.1 KB Created: 2020-09-20 01:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9da23463912c0bd466712de1857e066 SHA-1: 1af49be236fc9d3ad65395774c6c22cefabcd5aa SHA-256: 6203ad6b63ff977d6120b91511deab9aeded9c43e26a0abb6e8b3d25ec7e5273
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body itself contains obfuscated text and multiple links, including the primary malicious redirector URL. The presence of numerous PDF links suggests a link farm or SEO poisoning attempt to increase visibility of the malicious content.

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.link/wix?keyword=two+step+cowboy+boogie+dance+challenge
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0e36bc28-317c-4391-881d-aea45ce60b3c.filesusr.com/ugd/3283b0_1aff28db71ee46c187a3d50005cc4e87.pdf?index=true
    • https://ad112545-6a6e-409f-8030-4ed1f0f9b641.filesusr.com/ugd/2eec94_b2075313521c4ddca5739d3849744150.pdf?index=true
    • https://36b013ca-dc19-4794-9603-38498bccd6ae.filesusr.com/ugd/d93890_15eb6070a5eb42559970f9fd9e48b7bc.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0464/7183/9912/files/74710409967.pdf
    • https://cdn.shopify.com/s/files/1/0454/2994/8572/files/ragudorogunuxos.pdf
    • https://cdn.shopify.com/s/files/1/0484/3880/4648/files/can_you_return_formula_to_walmart_with_a_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/chemistry_in_context_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/tigepuginodibabofabak.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/duwuxuxomedusetevij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/vujusolanifegem.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84418365849.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/44728643494.pdf
    • https://1d30848a-2187-49fc-8f8d-f51026072cd1.filesusr.com/ugd/d1fcfc_1288755570e04a9aac42c363126cbb26.pdf?index=true
    • https://345f8d76-86b8-4b60-ac83-70b1c27ea96f.filesusr.com/ugd/685707_57da0d90a8cd4fd3b0126af11af373e0.pdf?index=true
    • https://a8b17cb4-fef1-4d90-baaa-92a53dcb047e.filesusr.com/ugd/eddc50_7d036233ae6c4ea485f21e226641a904.pdf?index=true
    • https://73fc5ee3-3945-4c10-8135-d990b56a8cc3.filesusr.com/ugd/70e7d4_0531b1b9eda746bb99ffc799bc5cf86c.pdf?index=true
    • https://e27933b8-802f-4c5a-8a7f-7a96d1dea58b.filesusr.com/ugd/c57cae_52207b51fe7249a68ca0fcc4e5d4228c.pdf?index=true
    • 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_off00006c24.bin
3db896d5516675b06490bcb508cf1a5faa6c716c0221deb6279d490b1274c263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C24 5520 bytes
font_01_sfnt_off00007ef7.bin
a8e90e3cf8c8ade204d1273812a4e0290ef043292e546d110f0a6c37fedfd95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF7 10648 bytes

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