Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d478e87e956a294…

MALICIOUS

PDF

51.2 KB Created: 2020-08-09 13:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb6096b211c3f846e8fa0a8190983dd SHA-1: 16c5ed805e31c4f39de25fcfe1a158dfc56eccaa SHA-256: 4d478e87e956a294ed9a691d2df4daa1bf8c4e55ea506f281ab7997e528ba0ac
136 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document body text, though partially obfuscated, includes the phrase 'Form of application for economically weaker section ews certificate pdf' and a URL pointing to a malicious redirector. This suggests a social engineering lure to trick the user into clicking the link, likely leading to further malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=form+of+application+for+economically+weaker+section+ews+certificate+pdf
    • http://files.leslieslanguage.com/uploads/1/3/1/3/131379054/b713945a88a8552.pdf
    • http://bokokazu.triciazoeller.com/uploads/1/3/1/6/131637881/gusuwavelujamoke.pdf
    • http://files.jessicakinziehunterplatt.com/uploads/1/3/2/6/132680808/a94c4.pdf
    • http://files.lwcmusic.org/uploads/1/3/2/6/132681901/sosevolizute-fizudozi.pdf
    • http://files.cherryhillspeech.com/uploads/1/3/0/9/130969241/riminowo_fupij_zetupomumidebep_bakera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/maginufojevozamikiwololun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/66411788536.pdf
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/atkins_physical_chemistry_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7555/files/accounting_for_decision_making_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/1018207136.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/90674975882.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/xifiritumifeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/parliamentary_sovereignty_in_uk_constitution.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/19399418782.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/tosapovoxeninaximiluku.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/66614005822.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_off00007115.bin
35b6cc206af30332680074dc6d64426584a1c8da24edadeb034b9dde47bb5888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 5516 bytes
font_01_sfnt_off000083de.bin
c00db0c28c2a01a6ae95d9766c13b50bbce8904582dfeaf359a8d289cc674f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 10244 bytes
font_02_sfnt_off0000a71d.bin
70f5dc55a7e07e5e90f6ad1bcfe74db7875709cac57c168aa15a95510cb0f200		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 6800 bytes

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