Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4ff23b35f9a029…

MALICIOUS

PDF

100.9 KB Created: 2020-10-27 22:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7b2ee5579f12b8611d62bd18f710d0f1 SHA-1: dc2d93c6b95c79910dfb68cfe5ff7232ea43ab1f SHA-256: da4ff23b35f9a02943dbd0e1cbbae519260d59a94019dacda8c03027628a11cf
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=jambox+jawbone+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f90646901c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f8c8ec481d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f8cefc1036c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f8c03d9a8418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f970ca90260f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/73d889a8-eb04-4f9a-bb9d-c4f29576b234/suicide_squad_full_movie_free_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0d7269-328b-4481-9a7f-ba665c123873/momud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caed2a22-e35e-4385-97c9-49abb71aec54/kameredoxozekimipada.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/22618326922.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/comparison_between_c_c_and_java.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/loganifod.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/45077960614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/fannie_mae_guidelines_for_self_employed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3766/2615/files/3932452333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9233/9614/files/fiesta_fatal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/mystery_case_files_ravenhearst.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/pokedido.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013fda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FDA 31432 bytes
SHA-256: 0004ceff67080c1cf5138ebf45c3368360c56c73f05814a70135b0b20f12d0a2
font_00_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 4676 bytes
SHA-256: 3574db3e044f3e0d0ac690f63e8388d57276bb49a214e3c4830431462b22ef64
font_01_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 12944 bytes
SHA-256: 9fb0379ccd93bfd79fd4371ad30486bff9db0eee489fbfb6d4d6501f6d77fcb4
font_03_sfnt_off000177c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.