Malicious PDF — malware analysis report

Static analysis result for SHA-256 425d33f4bb774ee6…

MALICIOUS

PDF

79.3 KB Created: 2020-08-07 04:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d313e039d0672bd5c7e71e5c5ce6c1f6 SHA-1: 2724f440ddcc6c7f00018f9ba3477a9d330a0ffe SHA-256: 425d33f4bb774ee6fa0fc66b7e1eea17751c9b91b1205f8f135e23762d1f04a8
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=mario+benedetti+biografia+pdf'. It also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be intended to trick users into believing they need a password to access content, likely to bypass security controls.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=mario+benedetti+biografia+pdf
    • http://rukumubo.huronvalleybaptistdistrictassociation.org/uploads/1/3/2/7/132741555/3741400.pdf
    • http://files.wissamsouss.com/uploads/1/3/1/4/131407369/7755901.pdf
    • http://files.mypcda.org/uploads/1/3/0/9/130969999/wixefigewixok_xexav.pdf
    • http://files.tvea.net/uploads/1/3/0/9/130970003/lojulaze_sevejo_debivitoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/xateludalofaraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/77871712480.pdf
    • https://cdn.shopify.com/s/files/1/0432/1404/5341/files/nisulewasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9911/9013/files/88725586317.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/38626266298.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/36909080993.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/tadora.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/christmas_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/povevegilatoruke.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/dokilawaparolovarunaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/62485157848.pdf
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/55438167420.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/gubolinepetepomukinonod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/dajuz.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_off0000f51d.bin
bd45022c846256304017745242b63fa7d1b08246d8981cf9adb61e536a0178f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 5144 bytes
font_01_sfnt_off000106bc.bin
725a4f031bf068889ea8096b353c30ad431bf4a5e12e3b20884ba95fd59d141c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 12368 bytes

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