Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c73c24858af205e…

MALICIOUS

PDF

47.1 KB Created: 2020-08-05 02:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe534e66139a3e80f574c122e5d0d633 SHA-1: 99827ab49542f40b9824fdfa02dd5d193361fbbc SHA-256: 7c73c24858af205e5ee3ea7cd155ad31a5b53cf71e7764ba7a5f0de99bda8dbd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=learn+russian+pdf', which is likely intended to redirect the user to a malicious site. Another heuristic identified a link farm of 14 external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf'. The primary attack pattern is likely a lure to a malicious site via a 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.com/pify?keyword=learn+russian+pdf
    • http://files.centraloregonfillyourpantry.com/uploads/1/3/2/7/132740424/7488684.pdf
    • http://files.thecoveatfoxhollow.com/uploads/1/3/1/4/131453031/gakosoku.pdf
    • http://files.maladidaho.org/uploads/1/3/2/7/132740852/norejikavivewageloz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/kasubulatulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/zavawolilunimej.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/sugasesubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/delonghi_espresso_ec_155.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/zebumuxegoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/77642850616.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/cathodic_protection_survey_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/tejeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/29370777931.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/lagumuroxetikufopafo.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_off00007ce8.bin
b0a7d288787ba29d2a3cd59b16531cc73e1ba0b96ac9fc11928e98d7b09386dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE8 4944 bytes
font_01_sfnt_off00008dd0.bin
b5076edfd576d8fd1936d892329704bc0cb35eeffc6745709694a927d0493d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD0 9980 bytes

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