Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc14401f97476485…

MALICIOUS

PDF

41.3 KB Created: 2020-07-08 11:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414360eea1eef34db415de306e6d758d SHA-1: 6e25445bab92870a1a478b823a49ef029d7cc6a0 SHA-256: bc14401f9747648539686c90d41eddc6011c00419a0b1ea5039649251055780f
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to SEO-optimized PDF farms. One of the primary links redirects to a malicious URL, suggesting a phishing or malware distribution attempt. The document body itself is largely obfuscated but contains keywords related to 'biomedical signal processing' and the URLs, reinforcing the lure.

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=biomedical%20signal%20processing%20pdf
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdf
    • http://files.humblehandsfarm.com/uploads/1/3/2/6/132683088/xolexalux.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • http://files.howweglow.com/uploads/1/3/1/0/131070523/wafurug_xuxovabejenoj_bovezolewek_birosa.pdf
    • http://files.batonrougedumpsterrentalpros.com/uploads/1/3/1/8/131857818/gipewadadukozaj.pdf
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdf
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdf
    • http://files.thecotswoldcollection.net/uploads/1/3/1/4/131437753/kumowoloded.pdf
    • https://rapevexed.files.wordpress.com/2020/06/77937363504.pdf
    • https://gukiber.files.wordpress.com/2020/07/safodefujawu.pdf
    • https://gabotisiv.files.wordpress.com/2020/06/tijuk.pdf
    • https://bilasiwaz.files.wordpress.com/2020/07/tufafowuvalumalora.pdf
    • https://laxosuval.files.wordpress.com/2020/06/49637280704.pdf
    • https://nikiruweti.files.wordpress.com/2020/06/tinikesowerakewiku.pdf
    • https://sepedaxo278714988.files.wordpress.com/2020/07/16862862942.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_off000064ca.bin
eb62ccb8c1dca41f0e375960d158046ff8d4f0be289ccdd0beb1140eac2543de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 5232 bytes
font_01_sfnt_off00007667.bin
9dbd55d135dc49a6851fd8c2a7a47dd3bfa83dbfae24d06f0608086349447405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 10008 bytes

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