Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dffbed746b886cb…

MALICIOUS

PDF

45.9 KB Created: 2020-10-26 00:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 501f396e61cafc3243212829ee260727 SHA-1: b099ed91184b3457977d7981c2b984b8f41848f9 SHA-256: 2dffbed746b886cb3cbe0ef4fb149789e3847f990dc194557404c7732522e993
154 Risk Score

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 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are benign Shopify URLs. The ML classifier strongly indicates maliciousness. The embedded URL in the document body, 'https://ggtraff.ru/aws?keyword=nefrotoxicidad+por+anfotericina+b+pdf', is the primary indicator of malicious intent, likely serving as a lure for phishing or SEO abuse.

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/aws?keyword=nefrotoxicidad+por+anfotericina+b+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f941ce3642fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f88519991ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f93d8a76f247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_5f93b40b4fd8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f87d5c1dff43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f9588491b2d0.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/1/0430/1484/8671/files/prepositions_worksheets_with_answers_for_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4565/8009/files/pokemon_blue_cheats_all_starters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rugizubufemat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2750/2508/files/41773092808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6762/8440/files/connect_form_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/80714292084.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/basic_mathematics_formula_for_competitive_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/entrepreneurship_development_notes_for_bba.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/42738799786.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/absolution_gap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9390/0455/files/digitally_sign_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4467/4979/files/science_graphing_worksheets_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0041/3346/files/konowijapomot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1734/7487/files/antivirus_download_free_for_android_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7625/3375/files/gamepad_compatible_games_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/nifum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4687/0426/files/desastres_naturais_em_moambique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/tobisokug.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_off000075df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DF 5116 bytes
SHA-256: 03b852b49ec1808dffdbb6d456e0f69736b6da7431fe8e2d498152a5804217e1
font_01_sfnt_off00008757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 10068 bytes
SHA-256: aa494ce401c1bd636b0199cd37dabe4d173ffd4360ad21c3e050ff3dc5438323

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