Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaf8fdae92c5637…

MALICIOUS

PDF

36.5 KB Created: 2020-03-22 04:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6d84b59b7d4aa60482440d5a0d8d2185 SHA-1: 3a65b6d4f3ce33b3781289ffddab58b9869ba572 SHA-256: ccaf8fdae92c5637a1feb4269ec8fea40e7a1591868c0d607390bb4df6a82b60
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic to a network of sites. The document body itself contains academic-sounding text, likely a lure to disguise the malicious nature of the links. No scripts were extracted, limiting the ability to determine further payload delivery.

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://americanfuel.net/uploads/1/3/0/6/130620313/130620313.html#ejercicios+de+aldehidos+cetonas+y+alcoholes
    • http://beautyandthebeach.org/uploads/1/3/0/7/130739287/90733e5cf.pdf
    • http://northshorebostonrealtor.com/uploads/1/3/0/6/130621020/pomudelagagagepozoga.pdf
    • http://nomadicartist.org/uploads/1/3/0/6/130621131/faxazatavupomez-wakakolavaw-somalozituviriz.pdf
    • http://jodanalynn.net/uploads/1/3/0/3/130323286/0dbb77aff2.pdf
    • http://editor.bz/uploads/1/3/0/8/130814295/8899acb8d40f.pdf
    • http://hazardgg.com/uploads/1/3/0/6/130621057/xejekulokevokikuxivi.pdf
    • http://anathemamaranatha.com/uploads/1/3/0/5/130545745/8424643.pdf
    • http://nailandbeautybar.net/uploads/1/3/0/7/130776047/896402.pdf
    • http://www.ronleax.com/uploads/1/3/0/8/130814020/nizopefi.pdf
    • http://hostmaster.bags528.com.tw/uploads/1/3/0/8/130813325/duvopozevanazuk.pdf
    • http://spicedforyou.com/uploads/1/3/0/5/130550712/4227300.pdf
    • http://mindfulneuropsych.org/uploads/1/3/0/4/130490687/3726b60ed9ab3f.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669d.bin
ddcc3e6d267bdd55f303e4d60631e7a4d231d25a60f6d8cb1e59e3e808994ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 7804 bytes

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