Malicious PDF — malware analysis report

Static analysis result for SHA-256 e355e141ff612918…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 01:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c454bdd44c8487aa54989be70896bf5 SHA-1: c1ee309efd1da19dd9440b52e9fa15c7761138a3 SHA-256: e355e141ff612918237786aa86086294bcefc3eb764f19b272f09dea8d7a4cef
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=acids+bases+buffers+and+respiration+lab+report
    • http://files.daphnefatterphd.com/uploads/1/3/0/7/130775280/kikorozodegab-xelixi.pdf
    • http://diximak.fpcroswell.org/uploads/1/3/1/4/131412290/dulibuz.pdf
    • http://bipixen.artinfluxlondon.com/uploads/1/3/0/7/130738531/zibaxo.pdf
    • http://files.luckydogrescuechicagoland.com/uploads/1/3/0/8/130814235/f3e11833c9f.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/mobafami.pdf
    • https://cdn.shopify.com/s/files/1/0436/2164/6498/files/resistance_band_exercises_for_seniors.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/juzujifuwofitobiwisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/wotevokurowij.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/pdf_to_word_document_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/bisifubotabuko.pdf
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/descriptive_writing_worksheet_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/jotiwolubixujero.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/foundations_of_college_chemistry_15th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/9489713270.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_off00006955.bin
5ef646481f63aca231c6e2b943b4e00c80eb988b74631e5fae306437f2b70c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 5276 bytes
font_01_sfnt_off00007b45.bin
f2f65db45049a06767776ae134c07315c0f82f1d5def517129ebe6016457b14d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B45 9588 bytes

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