Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bedadd47c058de9…

MALICIOUS

PDF

69.6 KB Created: 2020-10-29 15:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 87fec99ab29948e00535e63c31d6fa39 SHA-1: 5e5b9ee4595cc70bd1e2309db4e7beba1c2c13e0 SHA-256: 6bedadd47c058de9b4df8a282b7e26fba667fb70479892afe8a42236c98a2b73
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute or obscure malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body confirms the redirector's presence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=mr+house+husband+yulhee+and+minhwan In PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/4580427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5f93286140211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8d6d55d6231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f87b15424c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f89293531f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f911ec8789cd.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/fedonazami.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/3e23b8cacdd4ce4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dorulusof/weight_loss_training_program.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/anabole_dit_rezepte.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/livre_pour_apprendre_l_anglais_rapidement.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/brillouin_spectroscopy.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/pinutevijedozubuvemetir.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_off000098f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F4 10720 bytes
SHA-256: cba65aef98a50e534f7474ef06d5f756a3050cc141aff1abf2e41413332d1fc0
font_01_sfnt_off0000ba4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4E 5404 bytes
SHA-256: 5ea4e22adaa88f1701c20465ea2383dc8758d17ad114d1da83d9f26b1b023c3b
font_02_sfnt_off0000cc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9D 11380 bytes
SHA-256: 20be47f3ec3aa7cf68f29222c47d66cc09a196ec50fc073f783eb796bff7ca99
font_03_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 16204 bytes
SHA-256: abfd345a6ea1e62b83e5b81470e97c0bb38d81b9d626d8407e597eb2d2192f0c

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