Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddd71b78b15cb2d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 16:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2448061e87214348cea440b6488ba938 SHA-1: 1a851b3159d4ab83e5cd0971cb24ea312a03ab64 SHA-256: 2ddd71b78b15cb2d049a8918e8e28329fd1d68f7efd36ded695947834a4df88e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF file contains a large number of embedded links, many of which point to external domains. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm strategy. This suggests the primary purpose is to redirect users to malicious or unwanted content, rather than delivering a direct payload within the PDF itself.

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/pify?keyword=barska+1-+4x28+manual
    • http://files.henrymaynardhistory.com/uploads/1/3/1/8/131857114/9935156.pdf
    • http://files.mccallinnovations.com/uploads/1/3/2/7/132741169/830524.pdf
    • https://cdn.shopify.com/s/files/1/0451/3798/5690/files/63882187297.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/zewapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/78802247649.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/forager_starter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/revilodan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/69195623992.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/99119438692.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_off00005a42.bin
387c5054f98ddb18780cf45e52033974caced10ce30ae447718167f2cab5b761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A42 5512 bytes
font_01_sfnt_off00006cfa.bin
d7c9c29428e7e937bd0f7e03623e0dd83d28e297d8c9e92cfcad8375a14be800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFA 13388 bytes

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