Malicious PDF — malware analysis report

Static analysis result for SHA-256 575dbfa7eaaecac0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 597e0345aea116340b7c2cec2d050e2c SHA-1: e261af24baee7a27112594e398806197372c5e41 SHA-256: 575dbfa7eaaecac0524142b4162a4f2c6653adedbcd76ecbd8322e7cf1f2add0
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure for a 'free download' of an English speaking course, which is a common social engineering tactic. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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.com/pify?keyword=super+fast+english+speaking+course+book+pdf+free+download
    • http://ladonif.castaiclakedragonboat.com/uploads/1/3/1/1/131164243/zojosupa.pdf
    • http://toluwezas.kulaspirit.org/uploads/1/3/1/4/131437423/vagabe.pdf
    • http://dipemit.fullmoonyogabirth.org/uploads/1/3/1/4/131407227/1393658.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/22613427418.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/77634335484.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/5343926801.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/cancer_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/67721439082.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/jusufinesekerudinaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/digus.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/fupusufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/learn_esp32_with_arduino_ide_course.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_off00006690.bin
cca07a5a66a37ab9088a0d33dd64b6f99b161fb1966a5dbb8e8de612cf9c6679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5816 bytes
font_01_sfnt_off00007a5a.bin
01538b953cf7c7eb3ac4b7458268d080b0bfd6a594cfbb2d3756d006c0b7c8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 10600 bytes

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