Malicious PDF — malware analysis report

Static analysis result for SHA-256 8226c31aac388fe2…

MALICIOUS

PDF

100.5 KB Created: 2020-10-30 15:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e4ec1f2a82635dccf428aa275a2d692f SHA-1: 5e433af1db907ba88fbf535b764b2e36b87a46ea SHA-256: 8226c31aac388fe23310a1024d73a29ddd880e57669235eaa4f6acb27ee03e45
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/aws?keyword=big+o+notation+taylor+series, is likely used to redirect the user to a malicious site. The ML classifier also flagged this PDF with a high probability of being malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=big+o+notation+taylor+series In PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/rajezuluzawibi-jupaj-wavaxalisume.pdfIn PDF document text
    • https://dojumavuj.weebly.com/uploads/1/3/3/9/133997280/rodatigekuzozukukud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f95e657d4018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f9a22fec4b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8a7d12089b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f90e3c989c2d.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/9047386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f907b28bdf1a.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/1/0498/4940/1499/files/python_3_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7264/3781/files/pradhan_mantri_yojana_in_marathi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 3016 bytes
SHA-256: 2e5edb16b3213aac72f044458146fa31432b4de2d099e09bd529977e30638444
font_01_sfnt_off00011427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 4792 bytes
SHA-256: 2b60c305d4d1798c4c0e1eff7da3d9b8f3407c27229df6ae198665233f2b606f
font_02_sfnt_off0001247c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247C 16692 bytes
SHA-256: f1c407f42dceddb114119092cc3fb87906be72df1b4fe5b3044b4811dcab2f16
font_03_sfnt_off00015bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC3 17052 bytes
SHA-256: d3dec9373d2c5578f054c3ca567b918ce1906d94271fb4de27c2d3c8327f4266
font_04_sfnt_off0001742a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1742A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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