Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a78facb021b0b8…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 18:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01196f6f82f576e8ffffe406a9751b2f SHA-1: c1a3193f72efa14100a02f10980d6c4c33c65eb3 SHA-256: 99a78facb021b0b804128d4abce47fcb5af8d2e397cdca874516fb8242aae05a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The document body and embedded URLs suggest a lure related to 'online pdf watermark remover software'. The link leads to a redirector at 'ttraff.cc', which is a known malicious infrastructure. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation to improve search engine ranking for malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=online+pdf+watermark+remover+software
    • http://files.mrsgreenger.com/uploads/1/3/0/9/130969659/gonelag-kibewofu-keguvaxusatawu-xodotesedoza.pdf
    • http://files.villa.balibidadaritours.com/uploads/1/3/1/4/131453171/moledi_gapuromeba_setatefuxuja_tanudutagasipad.pdf
    • http://sodemotip.lancelawrence.com.au/uploads/1/3/0/7/130776485/taziziretaz.pdf
    • http://files.covidhelp4highland.org/uploads/1/3/1/4/131406563/4ce14.pdf
    • http://files.partoencasamujeressabias.com/uploads/1/3/2/6/132683014/vigavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/actual_reading_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/23523641839.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/18965601011.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/benign_intracranial_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/88546353979.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/zimatizokosupewufetor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/domain_driven_design_distilled_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5127/7726/files/rofuzameko.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/77568198835.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/auditoria_contabilidad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/48321734433.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/nuwevoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/pdf_file_at_least_one_signature_has_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/wuzajiloloxefobowasevan.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_off00006692.bin
64556090edb6b371acf2fc5250c6bcbaea262313fe5990852a0b08119b1385ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6692 5428 bytes
font_01_sfnt_off00007911.bin
8d56b85961cea26f7fd2d047d0b147c481055c563dead6e7799e4de559bfd7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 10592 bytes

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