Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7253c2578e9aadd…

MALICIOUS

PDF

41.0 KB Created: 2020-08-20 04:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633edc313fcd53195b8998b602f149a9 SHA-1: 5fdac8cd516b4387281e6de0f7eaa4ebfad939f2 SHA-256: b7253c2578e9aadd6b8d23c4ae9f06a0c4a6725451d9efa60d1fde1e876f162d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a link farm and a direct link to a known malicious redirector, disguised as an "Eutrophication worksheet for students". The primary malicious URL is https://ttraff.ru/pify?keyword=eutrophication+worksheet+for+students, which likely leads to further malicious content. The document's structure and embedded links indicate a phishing or malware distribution attempt.

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.ru/pify?keyword=eutrophication+worksheet+for+students
    • http://lelawibi.ambergirl.org/uploads/1/3/1/6/131637036/a22efc3278085.pdf
    • http://files.185686508.com/uploads/1/3/1/4/131407106/6c3dfce.pdf
    • http://dumezufam.kathrynthornton.com/uploads/1/3/1/8/131856979/1739198.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/tuwukasezuzorazujomonabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/93740645281.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/44233529615.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/dogatedinox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/35158345435.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/54536781804.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/sosidemoruror.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/41783169265.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/bimuralifakabarub.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/abordagem_policial.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_off00005518.bin
f63f45523ebde5550478f2ea861e2ce083d1b50b41866a0a22e0d77ee3a5824b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5518 5204 bytes
font_01_sfnt_off000066d7.bin
376627ea5f42e3ba74089b1034a2a0954a1228cfcb299864a83009301ea9d529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 9988 bytes
font_02_sfnt_off000088eb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 4324 bytes

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