Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1e836150ad3f89…

MALICIOUS

PDF

52.6 KB Created: 2020-04-24 22:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 87633717191320fb8daaedb2b499bb2d SHA-1: 6f7606ebc294d96ebc6816f7e50738c9b85ffbca SHA-256: aa1e836150ad3f89046003940fc5964551fc583933b870f651e87dfec0bce0d4
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this pattern, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://dj-imba.com/uploads/1/3/0/7/130775827/130775827.html#augite+crystal+form
    • http://youngandconstantin.com/uploads/1/3/1/6/131606268/7631589.pdf
    • http://thecdslife.com/uploads/1/3/0/2/130270932/lupurufasaduduvugaf.pdf
    • http://whatsgoodclothing.com/uploads/1/3/0/5/130590717/zirarivip.pdf
    • http://sostenibilidaddelmenor.com/uploads/1/3/0/7/130776735/kaninibixopive-gexubulus.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/6/130604836/sosejuf.pdf
    • http://relentlesschurchsav.org/uploads/1/3/1/3/131381101/tujilaja-fupedi.pdf
    • http://organicrootshairstudio.com/uploads/1/3/0/6/130620232/lupiduz_tajoro_vokuwavureda.pdf
    • http://dtaggartphotography.com/uploads/1/3/0/5/130544043/1642909.pdf
    • http://dtaggartphotography.com/up
    • 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_off00009600.bin
8fde2fdc42ebe4d89588073f6e9503ab21dbbd3cf54f62c90f78271f4ed9ad12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9600 9828 bytes
font_01_sfnt_off0000ba47.bin
a1abb0f129f7af4967d24bc75ea1aa8f377ae33cadb774a7560ff033e3c4dfe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA47 3708 bytes

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