Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d999eb38195d84…

MALICIOUS

PDF

41.0 KB Created: 2020-07-10 02:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da64dba8e51a548a57c781be17ebb7f7 SHA-1: a2af65da5b3b36a642ae4e64746f9ae8176b0789 SHA-256: d4d999eb38195d84309fb9a12b313c7d00c8e6b787145925f05e7eccf53927b4
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of URLs that point to external PDF files. One of these URLs, 'https://ttraff.ru/wb?keyword=simple%20present%20interrogative%20form%20pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading them to phishing sites or malware downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=simple%20present%20interrogative%20form%20pdf
    • http://files.kriloart.com/uploads/1/3/1/4/131453821/watex.pdf
    • http://files.jazzphilosophyfusion.com/uploads/1/3/2/3/132302966/4962082.pdf
    • http://files.jchristensendesign.com/uploads/1/3/1/3/131379353/6957106.pdf
    • http://files.montoyaspanish.com/uploads/1/3/2/6/132682134/147820.pdf
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.pdf
    • http://files.kingofkingslutheranchurchnnj.org/uploads/1/3/2/8/132815342/ee75c854.pdf
    • http://files.thegerryromero.com/uploads/1/3/2/6/132695467/185056.pdf
    • http://files.theporterauthority.com/uploads/1/3/1/3/131383823/xurigu.pdf
    • https://zunuxav.files.wordpress.com/2020/07/mevivibikopidezazafiruze.pdf
    • https://jagepoxuro.files.wordpress.com/2020/06/tuvabivi.pdf
    • https://tutegideso.files.wordpress.com/2020/07/lezegemagajuv.pdf
    • https://poxaxuxit.files.wordpress.com/2020/06/12145354215.pdf
    • https://ponevigafoti.files.wordpress.com/2020/07/mofamenabatagimi.pdf
    • https://ponusufos.files.wordpress.com/2020/06/lugakepobawudero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46605756913.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.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_off00006114.bin
e3efd45bbb5804a738dec78a126929bd480a3a5339d1cf91a28f6c69d4bcf9a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 5312 bytes
font_01_sfnt_off00007305.bin
a964ccdc95169fa481b809632c76ebb5ff528c7cbac401548908880d6151e12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 10504 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.