Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9ed1e889149569…

MALICIOUS

PDF

63.9 KB Created: 2020-08-04 02:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d18ee3a73fa1dd29f765b6806db14ca SHA-1: cc7c14b159389fba9eedfddb6e30a3d83cce83ba SHA-256: 6b9ed1e889149569d25532e709e4ada2f533659a9fe7319831cdfe6eea212d3a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a malicious redirector disguised as a download for "65th national film awards 2020 pdf download". The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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=65th+national+film+awards+2020+pdf+download
    • http://files.mandmstage.com/uploads/1/3/1/4/131453733/ramegafoxe.pdf
    • http://files.cnymariancenter.com/uploads/1/3/1/8/131856333/liwevitulabuxog-bifobijomekizuw-kilovis-zusefomikakijel.pdf
    • http://files.whistlecreekfarm.com/uploads/1/3/0/7/130775458/3894154.pdf
    • http://files.mymountains.fr/uploads/1/3/1/8/131856186/pibemitoledaxenexip.pdf
    • http://files.anytimemovers.com/uploads/1/3/0/8/130874125/gexud-kisuromuno-jagezodaduz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/33206440307.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7591/files/39383726299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/47923210525.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/nodowujaga.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/losapunaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/nomowagutaronetebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/only_the_lonely_1991.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9733/files/kupawiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/gravity_forms_4_columns.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/fahrenheit_to_celsius_cooking_chart.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/gurgaon_master_plan_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/kopajovuvemuziziveba.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a10.bin
fac727052601b08285b84d74a66947f9cba485d91cda90765e30354332f13665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A10 5828 bytes
font_01_sfnt_off0000add6.bin
94d7014ccb3543be3af7f076b1b368bb7fe9640361424b25f56145617a73e290		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADD6 15240 bytes
font_02_sfnt_off0000dd28.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 16164 bytes

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