Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f04af91c44dcf7b…

MALICIOUS

PDF

40.8 KB Created: 2020-11-02 08:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a099a3122d1f9a7a4d1e2e8c6e22c98d SHA-1: 1727aa5e11f9522bbb414739a175d4b458648a33 SHA-256: 1f04af91c44dcf7b99e4c9a5b91c9c28e7da2b305a3f2f5dd4685431011baa11
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/123?keyword=titanium+tv+apk+for+android In PDF document text
    • https://jawemojope.weebly.com/uploads/1/3/4/3/134399256/5402208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5f95237b0968c.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/6264e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f9f63763638d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f96ee6709aa1.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/tizevipizesov.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/99e38ce0e3cc80.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/1/0266/9710/5594/files/diagram_of_lower_body_muscles.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/fusionner_plusieurs_documents_word_en_en_ligne.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/nakidavimivosinelur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84d4552-9318-45ce-bdf2-f5d7272389c0/samut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8166/0082/files/pa_driver_license_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7197/7644/files/berkley_lightning_rod_shock_baitcaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0591db2c-1a64-4f72-97ca-126f3841a1d4/95882520475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/16690432576.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_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 5052 bytes
SHA-256: 9287b5fed3f84d06d067269ea0fb94cd41b724eb5e1e451bd5e0a0456645bcd9
font_01_sfnt_off0000731e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 10364 bytes
SHA-256: 5b95153ee40e5888958cfeadcf37296459968f1f391a7adb8578062e98e50421