Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1ac78629958815…

MALICIOUS

PDF

38.7 KB Created: 2020-08-24 01:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9fb9cc2c7eaa009fc1132b11128aa4 SHA-1: f0a15a43429bc397bfe19e3aa4ae24551937e59c SHA-256: 0e1ac78629958815ea6d3ae0a599c8e44ed2c7e83d37f271bd13ff92a37adc85
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link to malicious infrastructure, suggesting an attempt to lead users to harmful content. The embedded link `https://ttraff.cc/pify?keyword=format+sd+card+windows+10+for+android` is a critical finding, indicating a redirection to a potentially malicious site. The presence of numerous PDF links, many hosted on Shopify, further supports the link farm heuristic.

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/pify?keyword=format+sd+card+windows+10+for+android
    • http://files.capitalareaanesthesia.com/uploads/1/3/2/7/132710661/komokixuj_defumozepakage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/pizebixoxupexib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/61957114151.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/nidagikuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/suwevimalepowexopowexez.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/22446578215.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/tetalavizupuratokegoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/rigulazaja.pdf
    • https://cdn.shopify.com/s/files/1/0435/4752/5269/files/cuddle_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/72610849193.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_off000059a7.bin
56aad43975f893596a251ea73742024d497efd1ad3e24d7457e9415bfbe08970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 5376 bytes
font_01_sfnt_off00006be9.bin
0fde143e5dcdcf94f9e21279ea267a6dc3b2ba0dac891d7ba11aada24e00b7a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 10076 bytes

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