Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8dc63d9e1a5d81…

MALICIOUS

PDF

51.7 KB Created: 2020-10-26 00:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cd82b36107516f8330768145cd5edd33 SHA-1: 3c5119826bf669ce04973194b7ee3f0fc0853449 SHA-256: cd8dc63d9e1a5d81d2998b3b80deb884f48241a1324ad0a9edf02ca013adbe27
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'https://gettraff.ru/aws?keyword=walmart+financial+analysis+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's intended to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=walmart+financial+analysis+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wilugugo/buvobi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/560058855.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/83396675708.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/3276770091.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/ccna_cisco_certified_network_associate_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/46970295000.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/n_elleri_barbara_ann_brennan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316d4001-d9b4-484e-b3f5-3ada3e6b6e4a/jusexasikugulutid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737f3ad4-3b01-4aa4-ac8f-7f8893c04e7f/32651842856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319e2011-82df-458f-bd51-800976997d00/tfw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c91cecc-1f21-440d-bfea-ae10d03b81ce/zapaxokotabewolared.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad42b1c7-7b92-4955-b23c-0dfad1ac0997/89672499805.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/trevor_hastie_introduction_to_statistical_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/dilofili.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/kotizopitimogugawalelaba.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/guide_to_elliptic_curve_cryptography_springer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3930da70-d746-45a3-8fa6-bc57df2b88bb/maari_song_lyrics_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddafcb41-6be3-4f98-b565-ff2c9d78fe3b/fomotufubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4967717f-4023-40f9-b327-6f4773bdb082/manol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d84286-272f-4fbb-bb3c-f19de5610c3b/16300347307.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/93348263564.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/47952745660.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/atomistique_s1_exercices_corrigs.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/15653996207.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000726f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 5416 bytes
SHA-256: 3013758d8439dc2b714b23f7134fe3a755a93890003abcb5be354b2f38504873
font_01_sfnt_off000084d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 11180 bytes
SHA-256: 2159b67646f34200f631f83be7b4201eea6e6adf063fdaaeb0d25382f983581a
font_02_sfnt_off0000a97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA97F 16568 bytes
SHA-256: f7b56b29b46313bc46b9b75feaa3b9cabd05ba80f101ec84534f8c48de67a887

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