Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9db58df373649c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 16:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7fb26680dbe124e9dea9a13ae59d37b SHA-1: 08b53421db6f66d2880d732646842a4d5ca47aac SHA-256: 4c9db58df373649c02d8b72eca25e228c0a957ba80327d89c2e97999f69af8fd
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'construction estimate template excel free', suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify, likely to obscure the malicious redirector. The SE_INVOICE_LURE heuristic further supports the idea of a deceptive document.

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.com/pify?keyword=construction+estimate+template+excel+free In PDF document text
    • http://files.lifelonglearningpath.com/uploads/1/3/2/6/132681212/3c91b44480756.pdfIn PDF document text
    • http://files.blondinenterprises.com/uploads/1/3/0/7/130739233/8baa7.pdfIn PDF document text
    • http://files.silvestriphotography.com/uploads/1/3/0/9/130969704/bosinujobow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/41632287172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/78177439232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/burger_king_coupons_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/35992118771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/93362248477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/dosomobodadiridagerogudit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/server_side_generation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2118/4674/files/gerowigimuzob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/97868123115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/anycast_m2_plus_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/cervical_spondylosis_physiotherapy_assessment.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e51.bin
a23e37775d0868407d5046564551eb1d698c510480faa66740eb2a3e8b54d273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 5136 bytes
font_01_sfnt_off00007fb6.bin
f8a71a479c444a237ca08ed0a09c4ef204b07fbe7d3395f79b05abced2703970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB6 10332 bytes

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