Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78a0854696f37e8…

MALICIOUS

PDF

155.1 KB Created: 2020-10-28 23:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ec1ca0b9d0bee93f987124f7a5693eca SHA-1: 8190fc0a6933b6fb9cf8aa86fc4e7caf5e889928 SHA-256: a78a0854696f37e872192db383de14c0019e2856a2eb502017e6eed16c1359f2
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?keyword=perfect+law+of+liberty+esv'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/aws?keyword=perfect+law+of+liberty+esv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8e98048b10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f894b77a7013.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/56a084b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f87c8dad98fa.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/af2f4939-31f7-4b71-9b54-c9199a97bc36/xedoxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5446/3652/files/54926308753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2562/3958/files/seven_deadly_sins_grand_cross_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6202/4123/files/24154696056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0459/0742/files/hp_laserjet_m1212nf_mfp_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8650/1806/files/free_fourth_grade_language_arts_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0893cb6-3beb-43ad-9618-8fda47ca0c35/47964662423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/67646247345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2546/2982/files/tspsc_group_2_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7482/0528/files/rafuvipibik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/sopapuwatolabaxiwanotexud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2042/6653/files/63950677930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6293/3676/files/wordpad_app_for_android_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/fatufizivezeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7795/2186/files/14968063499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8173/7393/files/distributive_property_powerpoint.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00022e72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22E72 27372 bytes
SHA-256: 28b890aef4622754906d036c0da1ac8ce9b125ad891a808a5f5f9893f4f196b9
font_00_sfnt_off0001ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBD8 5272 bytes
SHA-256: 2a92b5aacf84ff7ae7f14551d3fb86db046fd9d3ca31250f015772704228b988
font_01_sfnt_off0001fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDF1 17280 bytes
SHA-256: 600efd4215cd74c7652162ca51f0018858e731b1d4411fdb26476b5c5fae280e

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