Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6eb4f387a09741…

MALICIOUS

PDF

49.0 KB Created: 2020-07-27 22:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba048dc82403f8ef0d571048deca011 SHA-1: 4184a2191e87784fca9c780c5ddaf94c9288350a SHA-256: 6e6eb4f387a09741e328ee133795a6f095d5e3dcbf627f35f7932c79aa1e441e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=black+bed+sheets+meaning'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of embedded URLs and the malicious redirector link strongly suggest an attempt to lead users to harmful content, likely as part of a phishing or malware distribution scheme.

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=black+bed+sheets+meaning
    • http://files.ogdendecks.com/uploads/1/3/0/8/130874012/5233519.pdf
    • http://files.bellizzibaseballcamp.com/uploads/1/3/1/0/131070911/9606387.pdf
    • http://files.alicesadventuresinrunningland.com/uploads/1/3/2/8/132814465/sukadagizotowilaku.pdf
    • http://files.capitalareaanesthia.com/uploads/1/3/1/6/131607374/5580890.pdf
    • http://files.wdsdu.com/uploads/1/3/2/3/132303312/mufovokevuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7283/1134/files/vugeriregabavekisosiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botolewapaniwid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/76237340512.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/jonizuretujagapumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/tosebinuvamexuzofamefajip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/jutatudoxeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/dimazigokepava.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/padakejem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/40436436620.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/49052477482.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_off00008245.bin
9b3d883cbb8bae15870bb426284b48a61a5613de820eabc1c5e21a47fcfb2c6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8245 5188 bytes
font_01_sfnt_off000093b8.bin
0ea210ab03fc738abdcb5c4727ab4a4d6a39f88f4e7536cd424dc1b7c921fe1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B8 10192 bytes

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