Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb559669677d489…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 01:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21c4d92783b05c5bad1b7ed1255ab9d SHA-1: 826485512896639a933bfdb80e9d9e153201939f SHA-256: 0bb559669677d489d2664ab2e5d20d57980444a98b0090708389a1cf13efabc2
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 potentially malicious redirectors or link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body text, though partially obfuscated, includes a URL that appears to be a lure for a report on industrial maturity, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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=acatech+industrie+4.+0+maturity+index+pdf
    • http://files.nekimastrategies.net/uploads/1/3/1/4/131454355/089a16d1d190a.pdf
    • http://files.braddykema.com/uploads/1/3/0/8/130873875/c789bd4a6d24d.pdf
    • http://files.cynergy-tech.co.uk/uploads/1/3/2/3/132303134/9a887829cc96435.pdf
    • http://files.lowefinancialservices.com/uploads/1/3/1/6/131636764/sonenelunevag-velepotesi-lotodulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/gogulanemuxumoxesan.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/zedubipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/digudidoladesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/javomimosikamegowabisap.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/sikh_minority_scholarship_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4600/8982/files/python_round_to_2_decimals.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/40295842569.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/negifadufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/xibukivapivojezo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/95076084239.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/wokodaxib.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_off00005c8d.bin
3b78bd30f932652e8b51eb05e26a1a5ca2a5f53dde4dee73dd060add49ced4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8D 5556 bytes
font_01_sfnt_off00006f49.bin
e7b11b4eda821b648b8a2af033d558de19d4b1aba59d0a7d458b7e9467a8e0fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 10228 bytes
font_02_sfnt_off00009235.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9235 4324 bytes

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