Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab1be6784702f0…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 11:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1007b1597e71148c771fc1ded13a1ec SHA-1: 8f0035e6e550ac88d43e3b9364b87cd85d02c8a2 SHA-256: fcab1be6784702f072f292436a1b89a226915f3a7229af9ddf71323ea14b5582
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=castle+clash+mod+apk+1.+6.+4'. This URL is likely part of a lure to trick users into downloading unwanted software. The document also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=castle+clash+mod+apk+1.+6.+4
    • http://files.arisecoalition.org/uploads/1/3/1/3/131380292/gixaj_velijutatadube_gixamelepoderef_sozamejopigiz.pdf
    • http://files.holisticcoachsg.com/uploads/1/3/1/4/131453818/0716fc8ac.pdf
    • http://files.sovereignfoodie.com/uploads/1/3/1/4/131406826/dazilo.pdf
    • http://files.nicklasart.com/uploads/1/3/1/3/131398264/wevone-sevefapakoneful.pdf
    • http://files.sarahrileyceramics.com/uploads/1/3/2/8/132814250/wopida.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/jiladiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/antecedentes_derechos_humanos.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/72320908122.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/factors_affecting_consumer_buying_behaviour.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/27823774553.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/gta_san_andreas_cheats_free_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/97627563521.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_off00005f64.bin
97560041e6e5484c64542b888c5a5fdc3fc0f688b470d5c82d0a98e822a93a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5512 bytes
font_01_sfnt_off0000720c.bin
0e8b1a74d4e73d8eab78b0ab5f74603ca86d84aff03e990c43eb818f2ac18f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 10256 bytes

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