Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8985b8ce3a681c…

MALICIOUS

PDF

51.0 KB Created: 2020-08-07 03:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02c50281b6bf9b05fda8dcc6e3acd01b SHA-1: 7d7de1eaf5ffbc1d5f8c40815d27b9c940b934d3 SHA-256: 6d8985b8ce3a681c3a0b5fa5939857bbbf9eaa9509333df4889edd3bcbad5d8f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users searching for specific book titles. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to lead the user to a compromised or malicious site.

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.ru/wb?keyword=pediatric%20nursing%20book%20parul%20datta%20pdf
    • http://files.orfeonportuense.com/uploads/1/3/1/3/131379296/zabegakoguxivobal.pdf
    • http://files.elizabethbaumanart.com/uploads/1/3/0/8/130813357/vigakikugi.pdf
    • http://files.catnip4cats.com/uploads/1/3/1/3/131380058/xominodefixedajo.pdf
    • http://files.edgertoncentermakerspace.com/uploads/1/3/1/3/131380723/worigibutasivid.pdf
    • http://nogasamo.lickandapromisekennel.com/uploads/1/3/2/7/132740405/1fc1689f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/adsorption_et_absorption.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/90133968832.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/ccna_routing_and_switching_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/mujafawajokofanebenujijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9365/files/black_hawk_down_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/astm_a240_304.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/probability_rules_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/vetozetupulawegipikof.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/kusepavixuxuguseda.pdf
    • https://cdn.shopify.com/s/files/1/0440/6116/3670/files/equations_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/24783490475.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_off00007646.bin
97da57b783e664e387f317339529f86127039d0d98816e348ebb3fa66ab55f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7646 5528 bytes
font_01_sfnt_off00008921.bin
579dc6984254574d34adc5833501e891f57d2c12782419eb14203b94651aff1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 17312 bytes

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