Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fe4b809f0c4a83…

MALICIOUS

PDF

45.8 KB Created: 2020-10-01 20:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f826443e51c62636c7e6b9db87226ea SHA-1: 03e2aded75898b4a7e82e19c1e640d0e46d2fea3 SHA-256: 03fe4b809f0c4a83597feea6a4aa5fda3a212b39b35b88ca4ab096926b56a0f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, https://ggtraff.ru/strik?keyword=hist%25C3%25B3ria+da+branca+de+neve+em+pdf, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to direct users to potentially harmful content.

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/strik?keyword=hist%25C3%25B3ria+da+branca+de+neve+em+pdf In PDF document text
    • https://site-1040223.mozfiles.com/files/1040223/xuluburojamanowokojipomim.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/radunomude.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/zunewuvegew.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/3236999480.pdfIn PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/11251494074.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/51187696655.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/97697048480.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/wiripirat.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/18612522407.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/64185541417.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/1/0483/8037/9287/files/arduino_elevator_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5020/7898/files/covington_community_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/24410687846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0785/5773/files/m36_tank_destroyer_battle_of_the_bulge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/fight_club_his_name_was_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8802/7304/files/intermediate_algebra_and_functions_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/56039848674.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_off00006edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDF 5564 bytes
SHA-256: 3a545e7c2a608016f6c33e1118c53f7fef566047cc6cc35a5091d8d247b5278d
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 12428 bytes
SHA-256: ae5a38e29c94dbb93a64204daebf95d021e1fa882721df630005a6df620f24f4

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