Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2051249185c0a25…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 18:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f450b7f39fa97d19aebaf2202dd7e6e7 SHA-1: 3d5d8ed8741f3a7d269fae059c18d1446ad31cdd SHA-256: a2051249185c0a25db8b1a529af6fe584b3a6244ea835ce2ddd240f8034be9fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL associated with malicious activity. It also contains a heuristic for a browser extension installation lure, indicating a social engineering attempt. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The presence of numerous external links, many hosted on Shopify, suggests a link farm used for SEO poisoning to attract victims.

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.ru/pify?keyword=android+emulator+for+mac+2018
    • http://files.camelliateabar.com/uploads/1/3/2/6/132681901/wemifulekeluw.pdf
    • http://files.cejcontractoraccountants.com/uploads/1/3/2/6/132695568/xebuzolirokarobibaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/72826620541.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/22918645222.pdf
    • https://cdn.shopify.com/s/files/1/0435/6489/2323/files/tableau_des_accords_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0438/0609/7570/files/nonobasixegiruxedeloxeb.pdf
    • https://cdn.shopify.com/s/files/1/0443/1210/1020/files/building_construction_illustrated_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/medical_surgical_nursing_ignatavicius_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0450/4512/1182/files/construction_quality_assurance_plan.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/office_365_status.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/alicia_keys_new_york_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/josupigofexonej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9124/7779/files/pilot_operated_relief_valve.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6321/files/altruism_research.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_off000070d1.bin
0dca4ef14ebbb85999bb51936e2c373e84ffc5765abc03a417e8e1a2031d9d3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 5496 bytes
font_01_sfnt_off00008369.bin
01508fa203d4faa2a1a3eb25cde09c2b24230719f27c3e382f2cec7def2b80ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x8369 10196 bytes