Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9f615cc2e069c0…

MALICIOUS

PDF

60.3 KB Created: 2020-11-02 02:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4f8986b54e299f3072e1e5d3cbb68797 SHA-1: dcd34c3a78d77deb741bcba3c12d127dad290701 SHA-256: cd9f615cc2e069c00735d90fcfaf2d7d8fef5cf6be5465347b8e1ebc7db9308b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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/123?keyword=proportionality+worksheets+8th+grade In PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/958736.pdfIn PDF document text
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/31733fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_5f9b5f0e136e4.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/nufojesotofogixodot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f99ed128cde9.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/6922800.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/84dfac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/bioethics_principles_issues_and_cases_4th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/wutijefawediduv.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/hearing_vs_listening_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/bikanotojipajazebujimu.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/advertisement_types.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/ahmedabad_city_general_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/wumuzivup.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/dd_form_2977_example.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/guitar_chords_for_dummies_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/19335578293.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E69 5464 bytes
SHA-256: d384ca34c070ebda89fbcff3db9d0dfeaf6f4f4eed4906dc20bd93dab38b8d66
font_01_sfnt_off0000b0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F7 10768 bytes
SHA-256: abce623cb2559a9d9afbfba6d8ca878bf704a7bb079ede11499f43838635048b
font_02_sfnt_off0000d5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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