Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d79ff16e92945f2…

MALICIOUS

PDF

48.7 KB Created: 2020-11-06 14:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d8b00adf236022ad1ab0288518be5af2 SHA-1: 9d6502159c3a75ef5ccfaa4a4147a6cfb126c1c4 SHA-256: 3d79ff16e92945f259a344b9b159debd1302d4d9fb99a07ea9f0d0055bc6ed95
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?keyword=windows+2.0+ima'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download site.

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/aws?keyword=windows+2.0+ima In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f94134b68cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5f943b4aee270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5f9ab348d1d05.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/a26db1b0-99d5-4116-9339-3485c15203e4/76773819801.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/sign_into_hotmail.com.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/koririmewupiladipani.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/riessman_narrative_methods_for_the_human_sciences.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/santhana_ganapathi_stotram_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9b8602-caa4-476c-9579-2cc7a2361e3d/bowejoda.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/doflein_method.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/6279076089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b617dfb-a559-4f4b-aeec-5738b1092015/canon_ds6041_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/lord_edgware_dies.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/al_quran_only_bangla_translation_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E5 4884 bytes
SHA-256: 069b22e1085e553e1fd574fafe248c8c1457b02d0837caf115866f4e409fb941
font_01_sfnt_off000069da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 5256 bytes
SHA-256: fef8d3d0d2150eebd616fe5aeaa5c00dca3f2306a6b0f11333aa23eb20b3bd24
font_02_sfnt_off00007bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10632 bytes
SHA-256: e4deee7dbc3bee1e97dd193186bb451f203adac3f5574ea6fce3a2bd46f99e7e
font_03_sfnt_off0000a02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA02B 16276 bytes
SHA-256: 17bccfb7a64461835d6ddb63e761a30f08589c19ef83ba3bc2e73128444d3ed6

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