Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2f8bc486dd9854…

MALICIOUS

PDF

56.8 KB Created: 2020-09-12 04:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e480daddbdfee6dac6454030228e720b SHA-1: 05219a274471a77aa4a4420530ff60624a188922 SHA-256: 9d2f8bc486dd9854c2275ab6181100587c55df434482477aa4200c71f2ad6250
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier also strongly indicated maliciousness. The primary attack vector is likely spearphishing, with the embedded links serving as the lure.

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.com/wix?keyword=population+community+and+ecosystem+worksheet+answer In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/zusafipoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8964/1891/files/codepipeline_cloudformation_template_configuration_is_not_valid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/jegufuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/dixalawipesiginaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/income_guidelines_for_food_stamps_in_louisiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/siruvakefukex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1423/8887/files/diplopia_binocular_causas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/28937709959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/wudapoxesisovoliwekusuruw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/oxford_discover_6_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/oscilloscope_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/51533486229.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_off0000942e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942E 5572 bytes
SHA-256: f6ce7b733f45161f4fea73be5a6dac872a4e1411c2ba56a559d7938ba7dbb2b4
font_01_sfnt_off0000a709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA709 14668 bytes
SHA-256: 442059dee3dc4615a679fb84045ac7577f39affb24a70da9b4b871ec19cc03ac

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