Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4489478883dc893…

MALICIOUS

PDF

48.2 KB Created: 2020-09-17 19:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142c5d37cd14cd69d7c50fb844c61a0f SHA-1: 26a6956c3a190bccceaa40a67ec39e9ecdc9300b SHA-256: d4489478883dc89300a29f0a98b132c0b0a48f22a9f58f908922c1275309585b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One prominent URL, 'https://ttraff.link/wix?keyword=agency+by+ratification+case+law', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious redirector URL, suggesting the primary intent is to lure users to this 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.link/wix?keyword=agency+by+ratification+case+law
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/98236152031.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/ashford_school_kent_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/cisco_router_3750_datasheet.pdf
    • https://13175d32-d99a-41eb-8c2a-ffa2dac8624a.filesusr.com/ugd/ebcc4b_d8e4d47f41c3460fa7dcfb7a121101a2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/fipexejisomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5899/files/xezavafuni.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/zoology_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0461/7302/8505/files/muwapubusejivapekega.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/solawapofinepumiwep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/92636578376.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/dufepivafufora.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/engineering_analysis_with_solidworks_simulation_2014_free.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fc9.bin
585a8b91a75d4cb669f2acaa666a51381d8af35d7c4a39db4f3832b0e7233dce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 5372 bytes
font_01_sfnt_off0000923f.bin
b078a8d50c4f129206957e8c7ba59e04c0c97cfa96377648880ad5f379e93931
pdf-font-stream PDF embedded font (sfnt) at offset 0x923F 9856 bytes