Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19f3de6ff157a4…

MALICIOUS

PDF

60.1 KB Created: 2020-10-25 23:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27ccea053e3907e2f4643dc16e25ab6e SHA-1: 14b59252189fbfa65414ca20ce5d83873ed67ec2 SHA-256: fa19f3de6ff157a4e368153ee5f9de64a56abe273e32a511237bdccfd5a0b7d8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, disguised as a search result for a PDF document. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of 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://ggtraff.ru/123?keyword=brave+new+world+chapter+1+pdf
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f890e5680f3c.pdf
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8ed1e313556.pdf
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f93b7be2b3e6.pdf
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f9241662d5f9.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f882ca17022d.pdf
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f8e4f336ef0f.pdf
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f87773f8abc1.pdf
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f8b2e7274d34.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gewisetug/statistics_and_data_analysis_in_geology_davis.pdf
    • https://s3.amazonaws.com/rodigapigeta/balance_general_ejemplo.pdf
    • https://s3.amazonaws.com/susopuzupure/fixukomemok.pdf
    • https://s3.amazonaws.com/mejifavo/dbt_workbook_for_borderline_personality_disorder.pdf
    • https://s3.amazonaws.com/zetare/gamosemukulo.pdf
    • https://s3.amazonaws.com/gifiz/79468958627.pdf
    • https://s3.amazonaws.com/wonoti/tell_me_about_yourself_in_hindi.pdf
    • https://s3.amazonaws.com/kijelopazekune/zodavulewunobume.pdf
    • https://cdn.shopify.com/s/files/1/0482/2273/2445/files/evan_milliken_ufc.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/maxeniduxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/memorial_day_crossword_puzzle_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adb3.bin
5c497481884ae3eee5f826bbe1899ce814b519ad5163ee7c41678510689d9f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB3 5316 bytes
font_01_sfnt_off0000bfde.bin
c139c23166c16c5756eefdc0a33faebc323005042f91eb65ee51f57f29aa0986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDE 10380 bytes

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