Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b9ed2aea579855…

MALICIOUS

PDF

53.0 KB Created: 2020-11-01 06:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 86adea0794995188ee71cc15138c28ef SHA-1: e5d5b4645bc1fd696a126255f071b54cd5cfad2c SHA-256: d4b9ed2aea57985567f0f4e90405d6fe33c88630a43c72ad51f7f08517504978
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is highly indicative of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. No scripts were extracted, but the presence of a malicious URL points towards a phishing or malware distribution attack.

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=dead+trigger+2+all+weapons+apk In PDF document text
    • https://tewubituzidebu.weebly.com/uploads/1/3/4/3/134359488/zifodipara-faravi-lidose.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/4316678.pdfIn PDF document text
    • https://sumozizadux.weebly.com/uploads/1/3/4/2/134266097/sapizisiwe_mejodepuwax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f923e757deb6.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://cdn.shopify.com/s/files/1/0266/7718/2642/files/addition_and_subtraction_worksheets_to_10000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9880/9518/files/renewable_and_non_renewable_venn_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce199cd-7d10-40ad-a6cd-e672959b74ac/watch_boss_hindi_movie_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6979/6252/files/assembler_plusieurs_dans_un_seul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5702/0565/files/ikea_bekant_desk_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/34655507088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514e7768-9d96-470a-a02d-2c7e95c7807b/xopokep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3895/5432/files/sap_bpc_11.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_off00006cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFA 5204 bytes
SHA-256: 0e7296fb98fa28dcd36869a6c3cfe757b658641b134728e7de52095c89693ee9
font_01_sfnt_off00007ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED1 10816 bytes
SHA-256: d9cee703623c61defa02f33e0706bb51ab135d1d3a06243dbe19ba1d0a68c1de
font_02_sfnt_off0000a3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F5 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off0000b8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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