Malicious PDF — malware analysis report

Static analysis result for SHA-256 713f5ddb82048a4c…

MALICIOUS

PDF

44.3 KB Created: 2020-07-10 05:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9591ab51993a3622b9c023ab7ac90375 SHA-1: 4521b669e06349386d707d5e0691c5d5bf993fba SHA-256: 713f5ddb82048a4c6f82fad461a651ed920381f1dee490b01b8ddb9135af5690
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains the text 'Strategies for forex success pdf' and numerous URLs, suggesting a lure to phishing or malware distribution sites. 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=strategies%20for%20forex%20success%20pdf
    • http://files.charlottedreamscapes.com/uploads/1/3/2/7/132710704/e55e8f97d3.pdf
    • http://files.christianlisker.com/uploads/1/3/1/1/131164314/68a2b3c.pdf
    • http://files.adoreweddingdesign.com/uploads/1/3/0/8/130813614/479691.pdf
    • http://files.ccaa-nsf.org/uploads/1/3/1/4/131437859/dorolami.pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://files.lkoc.org/uploads/1/3/1/3/131383497/bofepowoj.pdf
    • http://files.dianabradfordart.com/uploads/1/3/0/7/130739463/cc016b89e89.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fajokuf.files.wordpress.com/2020/07/87215491694.pdf
    • https://xefuwen.files.wordpress.com/2020/06/sufalijirilezonumekofejo.pdf
    • https://poxatesorev.files.wordpress.com/2020/06/80182581059.pdf
    • https://limalido.files.wordpress.com/2020/06/vulimasobewonake.pdf
    • https://gonaburezi.files.wordpress.com/2020/06/nupuvixaxesowiroxa.pdf
    • https://zezisid.files.wordpress.com/2020/07/15811824365.pdf
    • https://vawixezaju.files.wordpress.com/2020/06/49434684083.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.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_off00006eb6.bin
97c23b0bc40c4d0c0e2b238792f0d5a0170d932a309e638792284addef847f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 5236 bytes
font_01_sfnt_off0000809a.bin
4d6207ade48eaaacc39b6f8b45866e947dcbb25838ef9f8acd08c3e6fff213df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809A 10404 bytes

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