Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a48e86fd2c6e0b…

MALICIOUS

PDF

53.0 KB Created: 2020-10-30 13:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0823e2341a534c721aa90d4d684c81e9 SHA-1: 37947d2f713746da6ce119595830b99ee4c9900c SHA-256: 65a48e86fd2c6e0bbbed24975c7e8af09ec4a286d12d5aa476ead521c07e37d0
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 heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?keyword=sadlier+oxford+level+g+unit+9+antonyms+answers'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to lure the user to a potentially malicious site, likely for phishing or further malware delivery.

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=sadlier+oxford+level+g+unit+9+antonyms+answers In PDF document text
    • https://xuzojawuwakobo.weebly.com/uploads/1/3/4/3/134312069/gulagekabifewix.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/8839481.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/72d6abcc2.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/doduxod-pajezaxagi-feziwusenig-xurefuzof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5146/4896/files/apk_adobe_flash_player.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2847/8102/files/trackless_mt5_operators_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/91463928546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0191/3759/files/3rd_year_anniversary_gift_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/tifikakipulon.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/application_form_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/zirisatunadipil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ad66ab-332c-4ef2-88d3-84ce9b7d9e00/blbln_krk_arks_iskender_pala_zet.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000830b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830B 5808 bytes
SHA-256: 49932417ce3370f6b16148182bb16f51f423399292a864152378a7ecd3327489
font_01_sfnt_off000096d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D2 1812 bytes
SHA-256: f3f8a10abf5ce55e477725b7f83a617fdf5f5ffbd32311c17dcdcbc4c3e9fe25
font_02_sfnt_off00009fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAE 11684 bytes
SHA-256: 02e50ce5369b11839c56a3d92c25542334c47b2af51b60c51430ae4d2435a747

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