Malicious PDF — malware analysis report

Static analysis result for SHA-256 258e9fbe998d54c0…

MALICIOUS

PDF

49.4 KB Created: 2020-08-21 20:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 477358a2ff9be7a35477ed02ea051ba3 SHA-1: bf758d8ba6786013a00673114cc1f72eca41e259 SHA-256: 258e9fbe998d54c0e8383ba88967402d197f22fb04e3c751b52e652708e9b937
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=bihar+board+intermediate+admit+card+2019', is designed to redirect users to malicious content. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The primary malicious link is the most critical IOC.

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.cc/pify?keyword=bihar+board+intermediate+admit+card+2019
    • http://giserozu.mstorressocialstudies.com/uploads/1/3/2/7/132740505/932a2c3c.pdf
    • http://talefinij.sandiegobestpartyrentals.com/uploads/1/3/2/6/132695601/3c6d64b0752b7.pdf
    • http://files.robinsonauctionservice.com/uploads/1/3/1/1/131164251/taxesumipimanazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/exclusive_breastfeeding_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/98665187515.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/94926532339.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/arteriografia_coronaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/62760547176.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/14978245444.pdf
    • https://cdn.shopify.com/s/files/1/0429/2358/9788/files/vetavadugipujugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/68263976179.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/libro_quien_es_san_miguel_arcangel.pdf
    • https://cdn.shopify.com/s/files/1/0461/0981/9043/files/tobolafoxebuninugame.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/39593240464.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bf.bin
20eef2ef2af9199f94bce7fbddad729d9a82b37fd5589fb959cddc3a0fb3bf3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BF 5640 bytes
font_01_sfnt_off000075bd.bin
1aeca79f3d32c98eb538a9f43528afbe4bf68c1eb1ba7eb22c4a67df5722b74b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 13180 bytes
font_02_sfnt_off00009f8d.bin
2730a5e62ed11968948a7de30a5fbb4ab89a0aefa33bf2605b6f47ae7349a415
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8D 7428 bytes