Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a13e7463c0b6b10…

MALICIOUS

PDF

37.4 KB Created: 2020-08-03 03:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7be2ec9956989c575aceaab2b554104 SHA-1: 7294ac30034b2e7a04099410d789a0b475f83e73 SHA-256: 7a13e7463c0b6b103c5a12e80c6ae409b338407983c90114713ab1fdb76067ed
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 pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a likely attempt to manipulate search engine results or distribute malicious content through a link farm. No scripts were extracted, but the presence of numerous links and the critical redirector link strongly suggest a malicious intent to redirect users to harmful sites.

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.com/pify?keyword=deublin+rotary+union
    • http://files.researchingthewest.com/uploads/1/3/2/7/132740249/fomasus-jafigeko-vikixino-siwuvub.pdf
    • http://gesobalaf.jamesfarris.net/uploads/1/3/1/4/131408024/6326012749ef.pdf
    • http://files.valerieraps.com/uploads/1/3/0/7/130775108/1733755.pdf
    • http://jovanaxa.entreleadgroup.com/uploads/1/3/1/4/131406202/f3d98692cd0d69.pdf
    • http://files.memoriesofmatt.com/uploads/1/3/0/9/130969368/a8ee20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/minecraft_1._8_xray_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/sizoferuvuxadopadedapa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/guzakepusipo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/1763921810.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/82833569447.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/4828460453.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/jabiwev.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/86614179976.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/43946918021.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_off000056a5.bin
44d6adba6da4ed24e1ac46eebab06cc7117a80ba343a79fdd3d555336b25bf29
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5 4740 bytes
font_01_sfnt_off000066dc.bin
30e26e767e24bdbfe2a47569dfc0e012cbbd7bc2e1f8f34059c65516f1d89eae
pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 10116 bytes