Malicious PDF — malware analysis report

Static analysis result for SHA-256 476f70f6d361c55e…

MALICIOUS

PDF

39.8 KB Created: 2020-09-17 10:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a375a5d606694f29bf8b288ba97b28db SHA-1: 3c7dda31437def6e9d4f34d3aa6286379ef73efd SHA-256: 476f70f6d361c55e4ed5e94de2a2b98b6b976797a740089648292f00277b26a2
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary links, 'https://ttraff.me/wix?keyword=environmental+science+chapter+11+water+study+guide', is associated with known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains URLs pointing to external PDF files, suggesting a coordinated effort to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=environmental+science+chapter+11+water+study+guide
    • http://newifad.thegleasoncenter.com/uploads/1/3/1/3/131383791/9916012.pdf
    • http://jigemivex.quilcenebiblechurch.org/uploads/1/3/1/4/131483200/2375658.pdf
    • http://pukitid.annmcbridedesign.com/uploads/1/3/1/6/131606201/zulenudos.pdf
    • https://96a5c991-cbdd-4c0a-9ac4-ba399eebeab6.filesusr.com/ugd/668a47_fb66f3b0e32d44b69de7b59389b3e291.pdf?index=true
    • https://ff80f754-89ed-4765-bded-acf797b6457f.filesusr.com/ugd/3cb679_92a6b56d67ae49e1843409accf08a457.pdf?index=true
    • https://bcb109e5-92aa-4340-bcbb-b74f4d9939bb.filesusr.com/ugd/3ed44c_79964b74a5994dda8241365d996c9794.pdf?index=true
    • https://ed09bc9d-61d3-4d98-8a55-d7812d9f01b7.filesusr.com/ugd/3615fb_abd65233e4584d90b6c5815b1a1d7725.pdf?index=true
    • https://615cc0e0-e65b-4c8f-b3d5-4cc11746924c.filesusr.com/ugd/41a0b6_3aeff12deeee4c7389480eaf51c6e15d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/overload_assignment_operator_c_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/livro_brocardos_jurdicos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/watch_new_malayalam_movies_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/jefipovagizejokejukipe.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_off000059a4.bin
993375e417e7ae9f2966663ca0098d783e99fd137a85d5fd3168a82ced1654da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A4 5752 bytes
font_01_sfnt_off00006d26.bin
a5474b4cdee45096a0ad7732be62fd6d00fa341d18741199878af7cb271191cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D26 10864 bytes

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