Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbd261a433dd52a…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 09:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd427fb720c86a329f7d6d864352832a SHA-1: 88bc23c08c8e50fd348fdff40884b990bc1c8607 SHA-256: 6fbd261a433dd52ab87e8da8e2986f841dd0f6410dc22865a4289057427b146f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site or download. The document body, though heavily obfuscated, contains the same redirector URL and a large number of other URLs, suggesting a link farm or SEO poisoning attempt. The presence of a password-protected archive lure heuristic further indicates that this document is a component of a multi-stage attack designed to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=criminal+movie+songs+ringtones
    • http://files.launcestonmountainbikeclub.com/uploads/1/3/2/6/132695586/b62e817ba84ed5c.pdf
    • http://files.lajalostudio.com/uploads/1/3/2/7/132740424/2497877.pdf
    • http://kexigabab.cavatinaduo.com/uploads/1/3/2/6/132681670/tavoxagejig_vepabatawaju_loxumomit_rerivukig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0451/4054/1593/files/value_chain_analysis_journal.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/the_art_of_creative_thinking_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/discord_mic_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/1384/6693/files/junamonaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/neboxorefojogex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/best_python_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/352770276.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/functional_testing_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/80288769527.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/pocket_style_manual_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8042/files/tozejagu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606d.bin
abca171e5fbf6f93131293f19187ce7ed1303dc248fd9da340f73ede3cdb1304		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 4876 bytes
font_01_sfnt_off000070e0.bin
2d30403d522fb1e7c90fe25bdab098e82d2f6fbbf2ae5c032878defecf01737d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 9928 bytes
font_02_sfnt_off000092dc.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92DC 4324 bytes

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