Malicious PDF — malware analysis report

Static analysis result for SHA-256 626fde18b02aebe0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 16:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b9f80901e7b5d49ac5219e2de7c864 SHA-1: 2bd8b38719afda9b41328a844ab4485562765f89 SHA-256: 626fde18b02aebe0f17cdde3414eda73a23fff8fb444f1fce6de0cfbd3ab4c2e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a high number of embedded links, many of which point to redirectors or unknown domains, suggesting a link farm for SEO manipulation or malware distribution. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free software. The presence of a malicious redirector link and the ML classifier flagging the PDF strongly indicate malicious intent. The document also contains instructions to disable security software, a common tactic in malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/pify?keyword=diagnostika+delphi+ds150e+software+free
    • http://files.wildflourgrocer.com/uploads/1/3/0/7/130739830/jopinumaripegori.pdf
    • http://podexe.asssg.org/uploads/1/3/2/6/132681394/texatagamidoluj.pdf
    • http://gadiw.sophia-constantine.com/uploads/1/3/1/3/131379935/8456022.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/periodic_table_definition_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/chrome_extension_inject_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/artforms_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/75519482332.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/nazekifivusuwoget.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/mikurasugevog.pdf
    • https://cdn.shopify.com/s/files/1/0449/6562/6015/files/methods_of_data_analysis_in_qualitative_and_quantitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7793/files/arabic_numbers_1_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/basidutexudibowutad.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/pemilupuleninalimokakaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/kixekuselijegonagonifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/81102468745.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006142.bin
8b3aa9f1dbeca435508d0260f081db7387f51b2acb0e095f02124813f9e14531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5776 bytes
font_01_sfnt_off0000750e.bin
fbc8ab52fefbb27cb1f58fd91bcb3df1aaeb0166e6efb37bac89aa466bd47462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 10644 bytes

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