Malicious PDF — malware analysis report

Static analysis result for SHA-256 8450b17d342dbe30…

MALICIOUS

PDF

47.2 KB Created: 2020-08-06 21:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24147b1aa92fa2626baebfe9db4fadf7 SHA-1: cb17b76f1d12edd2251dca17b3628761e5d3f6db SHA-256: 8450b17d342dbe3000afa0f7b5580452207b1fdf62741cc4b6ac8e343ab9b7c6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to a known malicious redirector infrastructure at 'ttraff.ru'. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=case+study+on+accounts+receivable+management+pdf
    • http://xejeboso.myequinesolutions.com/uploads/1/3/2/6/132695818/092723fb0a9e.pdf
    • http://files.nextpromotionalproductsandapparel.com/uploads/1/3/0/7/130739713/2385699.pdf
    • http://pifebuk.beatabatorowicz.com/uploads/1/3/0/7/130739385/jefuseto.pdf
    • http://files.dc-struggle.com/uploads/1/3/1/3/131384424/fe942062da6a.pdf
    • http://files.belaccommunications.com/uploads/1/3/1/4/131437158/9955582.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/rwt_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/lufifowex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/gapojifafejopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/behold_a_pale_horse_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/30460850350.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/sobivejijuninazusaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/luruj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/fexazeruniwux.pdf
    • https://cdn.shopify.com/s/files/1/0447/1701/5194/files/antenna_theory_and_design_third_edition_so.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/92603250011.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/normal_cdf_versus.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/74477061066.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/fepuzilukusitinudosajex.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_off000077da.bin
116c455a6dca186f835a4f5b5286944b15d7d79e6e27b868268186b36be1eb6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 5684 bytes
font_01_sfnt_off00008b1f.bin
2fac796e9cca1fdc7a33f595bf8116d9f00bf2ac4ff5ef32b1a0286c901beb12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1F 10460 bytes

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