Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d015bcbdc48da1e…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 03:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d93a157e531eaf343bf549ba05c12916 SHA-1: b4d835d21f479976c2ad391bc454956f99bde40e SHA-256: 0d015bcbdc48da1ed8d61b045577083d7734b59648d80af3db9b2eaedf7f0419
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded links, with a critical heuristic identifying them as a link farm pointing to redirector infrastructure. The primary malicious URL identified is https://ttraff.club/wix?keyword=george+terry+proceso+administrativo, which is likely used to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=george+terry+proceso+administrativo In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b0a6355140284d5ea78165582bcba1ee.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ee6500cddca948f0a9db217b15bce96f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/45990023935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/96949182476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/furniture_store_blogger_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/equifax_free_credit_report_canada_contact_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/sadunodogabolusaxamug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/dilasuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/pametejodutogobipadumub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/ritudezuxulagomo.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_off000065e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 5556 bytes
SHA-256: 7aad36b842513a98c639d3214328a001f9c8ab61f8079b5bfe2c694e0a4a669b
font_01_sfnt_off000078ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 10092 bytes
SHA-256: c85be31e2497a3b7a8f1e1563a6934f86caac0f059e58c390766fd5ba70384ae

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