Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03519f8e3d892de…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 14:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8f3d15db322081a06c67848179da69c SHA-1: 4249a1520f9775688eac8d55f6bdca95a33412a2 SHA-256: d03519f8e3d892de139524d68c2a8ca05836c46bb03a74407796145c7a8ad1ca
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as an Illinois corporate annual report form. The document body, though heavily obfuscated, contains the target URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. The primary attack vector appears to be social engineering via a deceptive document lure.

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.
  • 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
  • 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=illinois+corporate+annual+report+form+cdbcaf
    • http://files.elaineewertz.com/uploads/1/3/0/9/130969322/6d4e4f6869dff.pdf
    • http://lexodabu.literaturehouse910.com/uploads/1/3/1/4/131408899/3414001.pdf
    • http://files.moonwaterdojo.com/uploads/1/3/1/3/131384429/nukinox_kusotidute_wujasekex.pdf
    • http://files.vjeronauka.net/uploads/1/3/2/3/132302710/de03b69ba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/80453318416.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0436/2017/1936/files/6th_grade_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/10443696340.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/zawoxokave.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/dexesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/40585775733.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/nimukiguwogivev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/73376035495.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/faginawilexa.pdf
    • https://cdn.shopify.com/s/files/1/0465/0772/0854/files/board_size_guide.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_off00006b13.bin
c37371a7e15a0fa5fee8d99ec8858885aa14ddf88b52dd23a851190d64d2de0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 5380 bytes
font_01_sfnt_off00007d36.bin
6cb8ec019c3411b97183bc813df140a66d26108444cf10c6e04c416c0d3f8fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D36 10948 bytes

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