Malicious PDF — malware analysis report

Static analysis result for SHA-256 899cd7ba711bde9c…

MALICIOUS

PDF

44.0 KB Created: 2020-10-15 15:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 63dc57882857db3797a2f907e0d2c572 SHA-1: 67e629439c5905c54b4a02a1541f3917320d90ec SHA-256: 899cd7ba711bde9cfea49854e9e7f7e9732ba86bb416bf4c93272c47acf01ca9
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, with the primary link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains text related to downloading a game and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=descargar+pes+2020+konami+para+android In PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/36827214089.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/82219617397.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/93933.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/watamavebon.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/fufirasabareguxil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8711651da4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f87446769b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8742375077d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8735b54d274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f87e9af8056b.pdfIn PDF document text
    • https://site-1043279.mozfiles.com/files/1043279/xunutapev.pdfIn PDF document text
    • https://site-1042448.mozfiles.com/files/1042448/duvojorinavonu.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/tipizajobizukizoxakapupiz.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/1/0480/2091/4335/files/jabevizitifanosedeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8326/2869/files/rugusefixujapotopojaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0847/3763/files/el_tiempo_en_los_angeles_por_hora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6371/7269/files/mulan_2020_spoilers_reddit.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_off0000686a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5696 bytes
SHA-256: 8edcf3f43fc9a1e6274bace7f1756818d2669d0a57245aa45a93c99bcb951e88
font_01_sfnt_off00007bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB6 11900 bytes
SHA-256: 393735467f068fca818a107d05d1b34d7364cf621fcdc4112bcb0e6a1c20cb4a

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