Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ba4b103bcae7f2…

MALICIOUS

PDF

53.2 KB Created: 2020-08-07 06:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc014b11c535f30823a3312d9d0a8171 SHA-1: 2f1bc456448cff63eea4bbebc6771c25d097671f SHA-256: 68ba4b103bcae7f26cc46ca5a54b73a382d7d0a010c0a4175d8b9d0a26f8652d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=cervicalgia%20tratamento%20pdf'. Additionally, it exhibits a PDF SEO link farm pattern with numerous external PDF links, suggesting an attempt to manipulate search results or distribute further malicious 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://ttraff.cc/wb?keyword=cervicalgia%20tratamento%20pdf
    • http://files.nottinghammassage.com/uploads/1/3/2/6/132681885/3948861.pdf
    • http://files.getelevatedny.com/uploads/1/3/1/8/131856041/mimofefijoni.pdf
    • http://files.sissynscooter.com/uploads/1/3/1/4/131455247/wenito_sixezukede_fixuxuxig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/guxibekutelaranojupajew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fejekav.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/puniwino.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/nigudibuxatesuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/rawigumobitazidazod.pdf
    • https://cdn.shopify.com/s/files/1/0444/7302/4679/files/hygromanteia_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/fesibotoso.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/guxezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/sketch_serial_number.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/medical_terminology_dictionary_prefixes_and_suffixes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/jetirifikogekasogosot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1537/files/buronuredokoweg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080bb.bin
0b3ccaf68d78b9f24653626ab752788abc4b1cbc8b89893c15242534ed405b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BB 5168 bytes
font_01_sfnt_off00009237.bin
3fa62c12b0c99168a05a604246354c0d312e092844297d332cddad2a698bfed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9237 12500 bytes
font_02_sfnt_off0000b80a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB80A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.