Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce57f65010ea495…

MALICIOUS

PDF

55.3 KB Created: 2020-07-31 10:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b3fd396d893c652db1def294b1cc51 SHA-1: 0e68d40330b5ded0b63a14d0cea9cb8551b5f408 SHA-256: 1ce57f65010ea495616af9698fe6f908c71a538f117b6d7545c074c48aeca6a0
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary link, 'https://ttraff.ru/pify?keyword=employee+termination+letter+format+pdf', is designed to lure users by impersonating an employee termination letter. The file also exhibits characteristics of a link farm, with numerous links pointing to external PDFs, likely to improve search engine ranking and distribute malicious content.

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=employee+termination+letter+format+pdf
    • http://files.pixelleadershipgroup.com/uploads/1/3/2/3/132302883/1992943.pdf
    • http://files.marinadeboer.com/uploads/1/3/1/6/131607023/zasekavoz.pdf
    • http://files.dorisellenestallo.com/uploads/1/3/0/7/130739060/farunakam_givawirefojujig.pdf
    • http://files.dorisellenestallo.com/uploads/1/3/0/7/130739060/f
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/fukakafuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/vafulirapiviru.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/dexoxegomumegalirokiporur.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/82758027876.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jitopiroxafidivozuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/fapazexudotomakoxoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/64808029926.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/zobut.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/48469221774.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/27764923668.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bd6.bin
2738ea185713a219351bf7a1e81b5f3c637f2e3725946d8de86dcfe177b25e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD6 4856 bytes
font_01_sfnt_off00008c3c.bin
72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3C 2268 bytes
font_02_sfnt_off0000964e.bin
199d74674ae3e67104d5945d02d39f8ca96459563232c62bb6a06ebc32ba192e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 10376 bytes
font_03_sfnt_off0000b9f2.bin
0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F2 16168 bytes

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