Malicious PDF — malware analysis report

Static analysis result for SHA-256 57175ae693f55ba3…

MALICIOUS

PDF

53.5 KB Created: 2020-10-26 05:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9da2696d38cec7809c52054502718ecc SHA-1: 95ebb1f92ec954db0845cdbe4c20aef605a227ef SHA-256: 57175ae693f55ba3d3a58feeaa3ee2ba88041e02b6517f841e026e9492ac4efa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as academic resources but ultimately redirect to a known malicious domain (ggtraff.ru). This indicates a phishing or redirection campaign aimed at leading users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=the+idea+factory%253A+bell+labs+and+the+great+age+of+american+innovation+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87778e0ba97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f90a200af78f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f96063f1dea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8e3404c169d.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/7855498.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/2244761.pdfIn PDF document text
    • https://jodobape.weebly.com/uploads/1/3/4/3/134317169/duwiwive_bipasuko.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/fasanag/vozizerelemedu.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/ethiopian_grade_11_biology_textbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/xurafivomatazeketose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9532/1496/files/section_18.2_electromagnetic_waves_answer_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5459/0880/files/illness_as_metaphor_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9277/8403/files/jeretatejug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9153/5018/files/vupanezusogodidaxuwonalig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3272/2599/files/ghostscript_to_jpg_resize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3097/3080/files/arri_alexa_mini_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8676/9053/files/sten_mk2_build.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/feduzoxazeruvivigivixogeg.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/samsung_tv_catalog_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/bin_dokuz_yz_seksen_drt_oku.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCD 5868 bytes
SHA-256: 0664af9b15589f6dfa4445fe8fc56e25f7cefdc92fe58c3afadc4fcf24361c1a
font_01_sfnt_off0000a3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A5 10628 bytes
SHA-256: 8a240177a0723e917d2b33fe87609543c757e147421f3f1d08662e89cc206ca2

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