Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fc141ca9f5d04a…

MALICIOUS

PDF

82.7 KB Created: 2020-08-07 19:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67bafcbd065676b0c04b279f66391cf6 SHA-1: 5ffa1345ba5a125dc763920857ba84139c00cdd2 SHA-256: d3fc141ca9f5d04abd78899d7723139ee909765fff2869640a1a2ec0fd05816f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. This suggests the PDF is designed to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Heuristics 3

  • 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.
  • 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/pify?keyword=virgil+aeneid+book+pdf
    • http://files.cincodemayosaintpaul.com/uploads/1/3/2/6/132681647/6597596.pdf
    • http://files.petemiller.com/uploads/1/3/0/8/130874109/kamajur.pdf
    • http://files.stmva.org/uploads/1/3/1/4/131453248/rulemubezirowexo.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/38771728404.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/the_righteous_mind_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/79839243387.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/62812422325.pdf
    • https://cdn.shopify.com/s/files/1/0430/7396/2145/files/employee_absenteeism_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/beautiful_creatures_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/46753467942.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/21636634701.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/50968692479.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/9th_maths_formulas_free_download.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_off000107be.bin
bfa532471c2161427267770258eddbd49ef2693cd08ba816f0109b14783ca672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 5200 bytes
font_01_sfnt_off00011982.bin
83038df0ba831c80a1c5d07f057bb4180345ac391be20fee78d544cadeaabeb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 10552 bytes

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