Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d2f9f060196f5a…

MALICIOUS

PDF

42.6 KB Created: 2020-07-16 01:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98bb4069f8c59b077cdd552f932b1afb SHA-1: 0a7728bae7e18491377125f4b96f8a1b95c38688 SHA-256: 76d2f9f060196f5a098394fa6fe70a9b35a4e79a0c146527d961ef83d5821045
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/pify?keyword=blues+piano+chord+progressions+pdf), indicating a likely phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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=blues+piano+chord+progressions+pdf
    • http://files.flyawaykate.com/uploads/1/3/0/9/130969607/722231.pdf
    • http://files.cannabutterclothing.com/uploads/1/3/0/7/130776714/daaac129fa86e.pdf
    • http://files.onlinehomeschoolbookstore.com/uploads/1/3/1/8/131856358/5537945.pdf
    • http://files.eastcoastridersny.org/uploads/1/3/0/8/130814769/6029d26fa74.pdf
    • http://files.wphsorchestra.org/uploads/1/3/1/8/131856877/6036286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/kawijepupesinabuxufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/14159011317.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/zodadijebepamafowogazi.pdf
    • https://zibasog.files.wordpress.com/2020/06/domedifebukede.pdf
    • https://togapona.files.wordpress.com/2020/07/kofipuzivedepewunija.pdf
    • https://zewafif.files.wordpress.com/2020/06/1356714073.pdf
    • https://peridesux.files.wordpress.com/2020/07/vegisovabujopinurosefef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/mikik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/13882127364.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/22747616353.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/wadunegokaxup.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/bibenubim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006405.bin
b591994eb43cc6f30077e8b35d390130409fc8fe2881338290a4a6dbdfbf49f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 5268 bytes
font_01_sfnt_off000075db.bin
1a2f8195fb8c963175bc520e78ad81ede22d048338e1753c72d865cc7a92b8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 12100 bytes

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