Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38660e6a4e352ec…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 01:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 518ece55892776877243624fe8d3a461 SHA-1: 38bf3ed5454eda5043a18f9e8a4515b5fbe71833 SHA-256: d38660e6a4e352ec5c467e280c1fb492440fae7f24ba080230cb0e74943f4e39
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying one pointing to known malicious redirector infrastructure. The document body, though obfuscated, contains a URL that matches the malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the true malicious destination.

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=8+ball+pool+3.+14+1 In PDF document text
    • http://kenuxazof.francescobaroneweddings.com/uploads/1/3/1/4/131407995/7656801.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3927/6699/files/wosonikilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/4993853323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/55101159552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/competition_bureau_misleading_advertising_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/74778134226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/jibokefabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/46000948761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/63945919039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/bigomorolixizopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/galoliz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 5116 bytes
SHA-256: fb2656c1b80d05018ddf94236dd3363272057d2f9ac2dfa4bafead78003095fc
font_01_sfnt_off0000693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 10148 bytes
SHA-256: 27e2cfad7e73455ab89d6fb55b9fc1e8bc80490949b6ae578d069bcffedf42f3

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