Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd6968a4ef1b814…

MALICIOUS

PDF

46.3 KB Created: 2020-08-17 00:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 878ad62d9c4783890a8017878188d148 SHA-1: 778a9c3134d46ad2ee6de65c3b71bdc5957d2fdf SHA-256: 8fd6968a4ef1b81453b4e7cc93ef8a49fb4f22f54e9e8ce11a93192a8a045319
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL, 'https://ttraff.ru/pify?keyword=block+sites+on+android+chrome', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful content by masquerading as a helpful guide. The presence of numerous links, many pointing to Shopify, indicates an attempt to leverage SEO or create a broad distribution network for the malicious redirector.

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=block+sites+on+android+chrome
    • http://files.thesaltandlightacademy.com/uploads/1/3/1/3/131397955/7797438.pdf
    • http://buzeko.oakpointechurchbradenton.org/uploads/1/3/0/9/130969808/miwimeva.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/39365828738.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/concepto_de_historia_clinica_psicologica.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/88249562521.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/80218573702.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/venous_ulcer_vs_arterial_ulcer.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/68683947165.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/pofigalovumadasobulolibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8507/9452/files/dogijufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/64830645684.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/91736667358.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/ridemowefijajejosozanama.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/bwv_1007_guitar.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_off00007784.bin
c5948e381f55792bed1455447f28df283118fd8f770829c6d896b5ff2b057327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 5292 bytes
font_01_sfnt_off0000894d.bin
fae7b084ec05fcc37510791ff0e2b1a8b9be41eeffb549fe39ca01911cb2a54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894D 10360 bytes

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