Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c004f0b0f975daf…

MALICIOUS

PDF

46.8 KB Created: 2020-10-28 00:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 24fd2a8837dd32ad4d9db729b57786dd SHA-1: 2d1bdd0f756afd2bd047ba81ce06e29123379c6a SHA-256: 0c004f0b0f975daf6b529855e1ee02625dc7179daabe00a066ab002c5b087bb9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to `https://ttraff.com/123?keyword=lg+32ma70hy-p+review`. Additionally, the document exhibits characteristics of a link farm, embedding numerous external links. While some links are marked benign, the presence of the malicious redirector and the overall structure suggest a phishing or scam attempt to drive traffic to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.com/123?keyword=lg+32ma70hy-p+review In PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/8133259.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/7046764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f9899aa591b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f989aae3bdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8a720aeea31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8f259580d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8e3ffa0c8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5f97dcf32f828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f948a665abfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leributafa/wujilumaxorilenikutuwuv.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/synonyms_meaning_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/manual_ide_eclipse_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/22613695168.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/syntax_tree_diagram_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/poverty_alleviation_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/adobe_acrobat_reader_indir_gezginler.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/tegirumaduvewalukovexozu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/18272858752.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/binuxilado.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/bnf_online.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/tojixedunurajilekan.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/71491724382.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_off000075dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 5768 bytes
SHA-256: 4c0fa5c0a30d10c9a3654c2d42cd4e48c2103875305b713b8f189e3141a569cf
font_01_sfnt_off00008983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 10660 bytes
SHA-256: 4c5dce7c34e2b9d694d8b488c96058556c8b6ad945e380395d2de3939b1320fc

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