Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f166695967b092…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 02:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408f3e970599fc52ac3f6aa4748c0cd5 SHA-1: d0491a0fe2db37bd69bea81e2d8dff7412b829b6 SHA-256: e5f166695967b092791e31c71d0f916bb62112a9f85ad7e4c078a960c29eb2cf
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=typhoid+fever+in+pediatric+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0429/9112/4643/files/fagukarikiwet.pdf'. The document body, though heavily obfuscated, contains the title 'Typhoid fever in pediatric pdf', suggesting a lure to entice users to click on the embedded links.

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=typhoid+fever+in+pediatric+pdf
    • http://lopaba.athleteslab.org/uploads/1/3/1/0/131069934/2956255.pdf
    • http://files.laneycobb.com/uploads/1/3/1/6/131606111/nibelijuzosene_kekujad_mezaw_moput.pdf
    • http://files.patwrightlab.net/uploads/1/3/0/9/130969310/3353222.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/fagukarikiwet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/24377712269.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/gorudupet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/15955539844.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/59176049755.pdf
    • https://cdn.shopify.com/s/files/1/0438/3303/2864/files/pilekule.pdf
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/79801209205.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/zupek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0436/0791/6707/files/degamixurijef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.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_off00006274.bin
e9db516ab89bda8a2f6cc59bfe690cd029e2fa721ac8eaa1b16369a2d9cd0ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 5144 bytes
font_01_sfnt_off000073f9.bin
e09c420b61e4666f641636a2ee74b499c5ce6f558229a5c47f1ea07d7169c0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 10100 bytes

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