Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad37aad9f3411fb…

MALICIOUS

PDF

63.3 KB Created: 2020-09-17 03:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000f5ce9c4750577bead2bdf3f0e4f63 SHA-1: beae95d9311259fcc3c8d8f1ebefc846b805be12 SHA-256: 6ad37aad9f3411fb94673e301ee012e7c5644016a7cdc383a34276c28d94c4da
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector link to malicious infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a large number of links suggests an attempt to obscure the malicious destination or engage in SEO poisoning.

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://ttraff.club/wix?keyword=amnesia+shin+bad+ending
    • http://doxewuk.ambermaslen.com/uploads/1/3/0/8/130814085/f98955c233.pdf
    • http://files.roninspires.com/uploads/1/3/2/3/132302816/9735965.pdf
    • http://files.winniethesiu.com/uploads/1/3/2/8/132815298/395a727cc241b.pdf
    • http://fuveganuj.warrensprinting.com/uploads/1/3/1/4/131482993/63793.pdf
    • http://vovigog.riverglennkennels.com/uploads/1/3/1/4/131454215/nixezexirazezib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/zaduwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/ave_maria_gounod_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/panasonic_conduit_catalog.pdf
    • https://8bc0219e-409c-41e6-8c85-97d4ffc648ce.filesusr.com/ugd/9d7ad9_1962f31ad00645aeb56d097c1310fe33.pdf?index=true
    • https://2577b3f9-bf4d-4739-a3d8-0906f44aa9d2.filesusr.com/ugd/4b874d_e7c82edc1ede46488aa9560fd3a576b8.pdf?index=true
    • https://efdf2754-479c-4b3c-8c74-5b208a75760d.filesusr.com/ugd/ceb2e8_6ae2111d0ee64d26bb60507a2d21fc29.pdf?index=true
    • https://55ebe430-fb02-43f0-82eb-41fd2304fb39.filesusr.com/ugd/234f58_5c330a72de8549049326a19dfaa8acb1.pdf?index=true
    • https://f4c103a7-333f-447b-a521-c97385ad2d02.filesusr.com/ugd/ebbcbd_bebd0f908848496ab1420ee7a6476b22.pdf?index=true
    • https://f23557ff-de4a-4c87-8c64-6c52ae32bc4f.filesusr.com/ugd/9df9d6_6ab7415da153458183660e5db77781c5.pdf?index=true
    • https://c22bb793-132a-4dd5-bb6f-86e13ed1bf2b.filesusr.com/ugd/fedf23_8d6be96ca5a1435d86f7a654f0b9f3d0.pdf?index=true
    • https://34493049-376c-4a09-948b-730700bad3b8.filesusr.com/ugd/99b222_2c22faa5582b47d0ae973f5aea8ab60a.pdf?index=true
    • https://ae443e86-e719-4f3b-bd71-5b9f7f7b5263.filesusr.com/ugd/5de1df_cdc93c6b92ea46c8ab332b4edff9e60b.pdf?index=true
    • https://df1845b1-b997-45a8-90a1-7ed501016e45.filesusr.com/ugd/bcb9fd_0973371036d2419d94ecdc7d6c95e9e6.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009338.bin
9deeee2d262b11500dd1a66977cc15a18076e4df40f58aacf7712041258e4ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9338 11540 bytes
font_01_sfnt_off0000b937.bin
a0d2648e90209369ac4a1625073ab83730dfc75c63fcfca38f986ff4e4042006		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB937 5240 bytes
font_02_sfnt_off0000cadc.bin
5cbfc01daee2746c77ef59184adc4115435ae0c1733c50491d5c955383cb580b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADC 10280 bytes

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