Malicious PDF — malware analysis report

Static analysis result for SHA-256 601cc4349ffefce5…

MALICIOUS

PDF

45.9 KB Created: 2020-11-01 14:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 753fa0fb511572497832413425a2f2b5 SHA-1: c6d59d7087df6c4a54a4fcef549b3381135fa809 SHA-256: 601cc4349ffefce5be9ca8726f2bcd3724ef57cba84c2521da070e39e2275741
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many pointing to benign content, indicates a potential SEO link farm used to distribute the malicious PDF.

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://ttraff.cc/123?keyword=starz+hair+salon+warrington+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8e4dd11d509.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://s3.amazonaws.com/zuxadol/busetevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/23340798068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4860/7137/files/50766746448.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/90955544195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6503/2871/files/57744704517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/jay_cutler_back_workout_2009.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/xudovilidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7947/6424/files/pagan_prayers_for_the_dying.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/mofovejufeboji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8892/7647/files/irony_figure_of_speech_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6378/4637/files/density_dependent_factors_include.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_off0000686b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 4996 bytes
SHA-256: aa947beea9b86d636a2b9579e22d3b1bd42d42e504876b0a330ca64fee773580
font_01_sfnt_off00007966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 10432 bytes
SHA-256: e357b7f189d5e6672d5028a59d345eb86be165a5882ab959de71df4f04e7317c
font_02_sfnt_off00009cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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