Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4747277a8622413…

MALICIOUS

PDF

45.2 KB Created: 2020-10-28 12:37:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 356daf96ecdf415051f198b8dc07265b SHA-1: b5a95ad94dc0064988177a41a03ecbc3bd387941 SHA-256: b4747277a86224136ab3e7b29fd466908bf9c8d3203f7a717d81863c3b1726aa
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 a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://cctraff.ru/strik?keyword=what+is+a+fae+circle', which is likely intended to lead the user to a malicious site. The presence of numerous embedded links, many pointing to Shopify and Weebly domains, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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://cctraff.ru/strik?keyword=what+is+a+fae+circle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f91f62675706.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/potevivikoxuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f9543c643beb.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/paterefi_werogi_lafumesob_rumixasenu.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://pufotawimudob.weebly.com/uploads/1/3/4/3/134380049/7106593.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/f20ef3.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://cdn.shopify.com/s/files/1/0504/9453/7898/files/speculating_about_the_past_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9844/3428/files/ccna_command_line_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7756/6109/files/geometry_for_enjoyment_and_challenge_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9185/2957/files/68109522136.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/chakras_y_yoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6775/4646/files/metabolismo_del_calcio_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2626/3459/files/3.3_energy_flow_in_an_ecosystem_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9508/0135/files/aap_guidelines_early_onset_sepsis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9646/7365/files/rolling_stone_encyclopedia_of_rock_and_roll.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_off0000686d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 4552 bytes
SHA-256: ebabc43d4240419e102279edbe513a95b077093da0717aa891f92cd2e53412fb
font_01_sfnt_off000077f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F3 9872 bytes
SHA-256: 232ec68fce544976525be691fde27090cae75d9652b036a9a22cae6c05ea6eb8
font_02_sfnt_off000099c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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