Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8ff8ec390ef446…

MALICIOUS

PDF

43.3 KB Created: 2020-10-17 13:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1d361959e3fb639f7505f594ff2a0e30 SHA-1: 56d5b5beb81f93f1628aa043860a75af11abeb78 SHA-256: 7c8ff8ec390ef446f70f3848168063ee0df0a8ecef741ac4ce3372ae32aeedc2
154 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to known malicious infrastructure, likely as part of a phishing or scam campaign. The document body includes a keyword 'airsoft double barrel shotgun' and the malicious URL, suggesting a lure to a potentially harmful site. The presence of numerous other PDF links, many pointing to benign content, indicates a link farm strategy to obscure the malicious destination.

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=airsoft+double+barrel+shotgun In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f888a09214f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8ab421ab66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8743aac302a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8765baad1be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be31bce-d613-4236-babf-996ccf0ab4fa/wobble_line_dance_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ee58c9-0a02-4211-839d-85a5635c46e0/bisemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179d589d-b343-4efd-af31-68c254103fae/4134998684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75182d13-aefb-4e34-a6e4-93058737b7af/vofinojipotalat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5159d62-bbbb-4015-9e86-3e4dd1fd6f9e/lapevewosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2783/2221/files/never_forget_me_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/msd_manual_consumer_version_intellectual_disability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0375/0817/files/roderozelifovukupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1428b8ac-dafd-4830-86cc-9beb3fa17f54/39911132722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876fddd8-236c-4bbd-bf9e-af7311f6192f/71548084512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6761/1542/files/how_to_bench_test_alternator_out_of_car.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5833/1300/files/round_chess_board_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7590/3392/files/how_to_hack_asphalt_8_with_game_guardian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/psp_homebrew_games_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8570/2344/files/electric_trailer_dolly_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7859/7790/files/34335517219.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_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 5296 bytes
SHA-256: 9b3f673532b7e830a50d7b715c83dbaba0e57c8d0383fd2a8fb77894fb852211
font_01_sfnt_off00007400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 14424 bytes
SHA-256: fbc2fa532fb58e52b8a5d860fca62bf0dc0510104a67e1f9f619122a735b1b90

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