Malicious PDF — malware analysis report

Static analysis result for SHA-256 21bc5bdd49ad9faa…

MALICIOUS

PDF

47.7 KB Created: 2020-08-24 08:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53220e96b5184dc644b0b84aacfd3f3d SHA-1: 8f900c01fe56f750d259c7777ffd44c31e9ad141 SHA-256: 21bc5bdd49ad9faa9dfbe8e7bc70a459ef3a5d6091b0dc2ae7fb0ed391a76fa6
160 Risk Score

Malware Insights

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

The PDF document contains a lure suggesting it provides an activation key for Kaspersky Internet Security, but it embeds numerous links. One critical heuristic indicates a malicious redirector link, and another points to a large link farm, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains the malicious URL and other PDF links, reinforcing the social engineering aspect. The primary malicious URL is https://ttraff.cc/pify?keyword=kaspersky+internet+security+for+android+activation+key, which likely leads to further malicious content.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=kaspersky+internet+security+for+android+activation+key
    • http://kisavo.plitechnologies.com/uploads/1/3/0/7/130739590/6434941.pdf
    • http://files.thehivsolution.com/uploads/1/3/1/4/131482931/pepiroge-gokevubelemi-sedukoforimopo-duketite.pdf
    • http://files.gabrielmalancioiu.org/uploads/1/3/2/6/132695915/792090.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/bautagebuch_bg_bau.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/36092808007.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/1394829383.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/96037895944.pdf
    • https://cdn.shopify.com/s/files/1/0430/5567/7591/files/alamance_county_arrest_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/1581878206.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/60608511544.pdf
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/lomojezazesodaregu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gatafuruzakelimosileraji.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/business_goals_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/62361729926.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_off00006a79.bin
31d4dd97cf5147e6b059c24d0fa5ef82248f625d272ff84a9e6c0d2f8a785f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 6812 bytes
font_01_sfnt_off00007bae.bin
05e94ab4069ce2332563fbbaa6b264dcf4f77a8b6b70fa2899c598b5be4c25b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAE 5312 bytes
font_02_sfnt_off00008de0.bin
528f3d95a251fc0c2b4b8c1463546d60f71277b768e32f1bdd0492f401d41dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE0 10316 bytes

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