Malicious PDF — malware analysis report

Static analysis result for SHA-256 17005ae44c662d63…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 00:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5b30139b6c36791645ce9bab1c389d0 SHA-1: 6f1f3496ab2f1e112333e3a6527f492765d14018 SHA-256: 17005ae44c662d635d1ef70e6556257dea7bf892788e24edcc7d4ee2749543ba
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=bhakti+yoga+sagar+pdf'. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=bhakti+yoga+sagar+pdf
    • http://ludezi.heilmansperformance.com/uploads/1/3/0/7/130776407/paxuxogow_ropagi_seterofejeme.pdf
    • http://mekudosa.edcentervi.org/uploads/1/3/1/4/131452883/3ee56b.pdf
    • http://womudi.arthitparade.net/uploads/1/3/1/3/131398234/4505498.pdf
    • http://fajemal.bethbakermath.com/uploads/1/3/0/7/130776257/zegedafej_fiwanolu_demajetesetilu_voxedadiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/weravo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/chromophore_and_auxochrome_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/81654518362.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/34108451275.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/bavejenebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/91435245633.pdf
    • https://cdn.shopify.com/s/files/1/0437/5835/4584/files/causes_of_cancer_disease.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/anorexia_nervosa_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/11962643879.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/xikoxemele.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aeb.bin
fd3dc79abbf7d59f840b41b86a26b9d57d373be871917ce862cd9d6aea6774e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEB 5488 bytes
font_01_sfnt_off00005da0.bin
9f7b1e2844a118865b7fffff05ae2c0eb80d4e44f76f29f755aff97bdb637807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA0 10568 bytes
font_02_sfnt_off000080eb.bin
7862da3180a8ff85001d4e27b9ff870ff6543f25406d34e782c7ee0835df124a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 8056 bytes

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