Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe5e5f271ec3234…

MALICIOUS

PDF

57.8 KB Created: 2020-10-15 09:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c1b3539f2b270c500a70302e1173785 SHA-1: 75314cda436377af26a790cce4388ac8c2f178fb SHA-256: 6fe5e5f271ec32349217495f2fd51bea60f9ba35c0c5a72005f6e42fb55ab08c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing to a known malicious redirector and other PDF files. The primary malicious behavior observed is the redirection to external, potentially malicious, content, and the creation of a link farm, likely for SEO poisoning or to distribute further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=una+chica+a%25C3%25B1os+veinte+pdf+gratis In PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/29291750366.pdfIn PDF document text
    • https://site-1045392.mozfiles.com/files/1045392/lajerisuxasutozafusuro.pdfIn PDF document text
    • https://site-1040124.mozfiles.com/files/1040124/wugiganu.pdfIn PDF document text
    • https://site-1040988.mozfiles.com/files/1040988/clinical_chemistry_and_molecular_diagnostics.pdfIn PDF document text
    • https://site-1043941.mozfiles.com/files/1043941/64233506482.pdfIn PDF document text
    • https://site-1039959.mozfiles.com/files/1039959/football_world_cup_2020_match_schedule.pdfIn PDF document text
    • https://site-1044303.mozfiles.com/files/1044303/lorimorakekonev.pdfIn PDF document text
    • https://site-1042591.mozfiles.com/files/1042591/waguxinotuwiluboki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87ac7e1951e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87bee9738da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f872923d7ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87ef890c781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f86f8450d45a.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/1/0432/4563/3693/files/enterasys_switch_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6316/0231/files/kuzilosovigoguje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6454/9272/files/travel_form_wow_classic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4473/2833/files/highest_ac_5e_monster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3565/0969/files/as_i_walked_out_one_evening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/kafinamipokil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5413/5976/files/pofubegologora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0941/5581/files/foxit_download_for_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4568/9765/files/escuchar_musica_gratis_app_android.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_off00009f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1F 5648 bytes
SHA-256: 7192888ea169beedb0c6e836fa6c4003827f25f0b696362e64e42810ce38f35d
font_01_sfnt_off0000b20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20D 11636 bytes
SHA-256: 035443153182735bebfc772d5401fb0bae3c0913ec2f2ba964ad9b2411d94ca5

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