Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d317c2a744d09…

MALICIOUS

PDF

34.9 KB Created: 2020-07-10 20:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1fe708b01df8ed39e5d266b3f7ab952 SHA-1: e8f8aee0ccf8ab7dab2b446ca96e55e2508ab8cd SHA-256: 0c5d317c2a744d09879adeaf65a3db11726c7c6ce6e136db64dd18a2f2a024b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including a primary redirector URL, designed to lead users to malicious content. The heuristic firings indicate this PDF is part of a link farm and points to known malicious infrastructure. While no scripts were explicitly extracted, the structure and embedded URLs strongly suggest a phishing or redirection attempt, likely intended to deliver a second-stage payload.

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.cc/wb?keyword=steal%20like%20an%20artist%20pdf%20download
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdf
    • http://files.alyssali.me/uploads/1/3/2/3/132303075/deguger-nuzawetugexa-vosutidufigelo-nugepa.pdf
    • http://files.gohea.org/uploads/1/3/1/4/131438150/902c87ef.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • http://files.diogenpro.com/uploads/1/3/0/9/130969834/9380885.pdf
    • http://files.mussa.ca/uploads/1/3/0/8/130814337/vutabakol.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • http://files.marketmovesmatt.com/uploads/1/3/0/8/130874629/nuvigure-bufagejiv.pdf
    • http://files.hawaiieventlighting.com/uploads/1/3/0/9/130969714/3527131.pdf
    • http://knowledgeworldbook.club?book
    • http://knowledgeworldbook.club?book'0761169253
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tojufedeken.files.wordpress.com/2020/06/kigelefapobuvirimezawi.pdf
    • https://linabanifogi.files.wordpress.com/2020/07/90013306368.pdf
    • https://vomewew.files.wordpress.com/2020/07/mepiwipumugev.pdf
    • https://lulepolagud.files.wordpress.com/2020/07/rejasirorovurapafep.pdf
    • https://guxevevavun.files.wordpress.com/2020/07/41229327451.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/nonewevifubafake.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/sazowujirinagoz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d31.bin
11948512ae125b7ffddeeebfddee9e1d31e3cf36dbf32b6048f1e36ad85671c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D31 5080 bytes
font_01_sfnt_off00005e86.bin
6116667114a361ff69b08dd7ef600c973971a6d12709174c5be538d46567cc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 9476 bytes

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