Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb888f26d72c2ddd…

MALICIOUS

PDF

63.8 KB Created: 2020-08-14 20:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fee5c55ed103432c9ec43849ad12b37 SHA-1: 4f19850ee69af3e430e8356f1225440f0d0f9434 SHA-256: eb888f26d72c2ddd7807c8a6f9477d35be577a0c2d0ceb558a22204446148ac2
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'characteristics of summative evaluation pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link. The presence of numerous external PDF links, many hosted on cdn.shopify.com, further supports the link farm heuristic, likely used for SEO poisoning or to obscure the final malicious destination.

Heuristics 3

  • 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.
  • 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/wb?keyword=characteristics%20of%20summative%20evaluation%20pdf
    • http://files.tionalee.com/uploads/1/3/1/4/131437318/90ba44f7.pdf
    • http://difomo.midnightpigeon.com/uploads/1/3/1/3/131379578/75e94f.pdf
    • http://files.hydrocracker.co.uk/uploads/1/3/0/7/130775950/vulevapakefelon-filuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/storyboard_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3272/files/pedasutolenemovububino.pdf
    • https://cdn.shopify.com/s/files/1/0432/7587/8564/files/radunom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/zunekarodupifegawez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/36630730245.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/8605357814.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/78215756225.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/21903784720.pdf
    • https://cdn.shopify.com/s/files/1/0434/7314/1912/files/1900772301.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/neduxobilarejatubitunug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.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_off0000adf1.bin
457ccf0114e1c3342d26e5c69c9c48112e17759a5337a94e371e43dbfb348c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF1 5360 bytes
font_01_sfnt_off0000c007.bin
2bfe9c3802ea2d297df96a25b7b88a6e068c3928f922029f117167b16684d59a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC007 10376 bytes
font_02_sfnt_off0000e371.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 4324 bytes

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