Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d388ea6b5f5a39e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-04 10:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b3cff7c6726f9ca4547a66592330f6 SHA-1: 851c664d61347ba9b2ef2587173af09007ba7568 SHA-256: 6d388ea6b5f5a39ec5155cd2b9d7791040c357935adbd38540a1ec732a9bfd0e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic match for malicious redirector links and a link farm, indicating an attempt to distribute malicious content. The embedded URL `https://ttraff.com/pify?keyword=coraline+graphic+novel+pdf+free` is a primary indicator of this malicious activity. Although no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or content-luring attack vector.

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=coraline+graphic+novel+pdf+free
    • http://files.vandersystreefarm.com/uploads/1/3/0/7/130775350/6896237.pdf
    • http://files.michellejestermain.com/uploads/1/3/2/7/132740905/4a69c9dce41.pdf
    • http://files.ianwarder.com/uploads/1/3/2/6/132681690/zepopogonam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/moselasuvub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/30181592297.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/55591376058.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/44531871131.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/76793184733.pdf
    • https://cdn.shopify.com/s/files/1/0434/8103/9013/files/41154278188.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/tirakuduwudani.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/68723288978.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/medical_terminology_dictionary_prefixes_and_suffixes.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/zijaronupuxopenurupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/46152666928.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/besaranu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.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_off00005c44.bin
68a81dfc6a10ad666942989f6d042ff4fae8d8b8fc2ec5ac30d82a187f900ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 5028 bytes
font_01_sfnt_off00006d59.bin
da68bbb0d7fa813e12bedb8d2f726a3897b3c9a8ec04c214f60d11954ae2be10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D59 10380 bytes
font_02_sfnt_off000090d8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D8 4324 bytes

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