Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da04474fe26207b…

MALICIOUS

PDF

53.5 KB Created: 2020-10-26 22:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ba33c1258614396cb39697a49fabb0f6 SHA-1: 988297ab04c528b8166f3d4da8134f7baf908925 SHA-256: 9da04474fe26207b10945608fbebb1301ed67abbf31520f46c4e1cf91b04cc6e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a heuristic firing for linking to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.link/123?keyword=twilight+struggle+realignment+rules', is presented as a link within the document body, likely intended to deceive the user into clicking it. The document also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious links indicates a phishing or redirection attempt.

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.link/123?keyword=twilight+struggle+realignment+rules In PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/1146150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f870fafdd91e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8aa0b7e413b.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/wukujilivaxagu.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/gafivexekuvo.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/1/0434/1789/5070/files/14921071510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/18961310020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9353/1555/files/ase_guidelines_pericardial_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6099/7529/files/anakkale_sava_tarihi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/adecco_thailand_salary_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/87181206781.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/bepal.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/94477113838.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/abdullah_calan_kitaplar.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/4059799642.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/jekupo.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/nitulofavirekixisuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/nephrogenic_ascites.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/maharashtra_audyogik_vikas_mahamandal_recruitment_2019.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_off00009037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9037 5140 bytes
SHA-256: a40354c9a28e78c038abf735b621676d2fcdd4ed6de52af387adf9e9f110c0fd
font_01_sfnt_off0000a192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA192 11632 bytes
SHA-256: 65d82fb13077ced5920128d5ff69ecef99b41da3d0225e5c3562179902f2976b

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