Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e3a15e2efdd30a…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 14:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbf8609a75cbd469db73aae59ed0f280 SHA-1: aac505c5ed4c77b3ab3ec066663b382cf59a7ffa SHA-256: 17e3a15e2efdd30ab422e672ba371ae94c9380436a55ae5d978e1192306968a7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bonafide+certificate+pdf+rajasthan'. The document body, though heavily obfuscated, appears to contain similar text, suggesting a lure to trick users into clicking these links. The presence of many external PDF links further indicates a link farm or distribution mechanism. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=bonafide+certificate+pdf+rajasthan
    • http://files.interactivecapitalgroup.com/uploads/1/3/0/7/130775284/javawoxarip.pdf
    • http://files.sharaimage.com/uploads/1/3/0/7/130775760/xutakafexagipa-menovoniziru-sidojamopotimad.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://weris.mrsmichelebrown.com/uploads/1/3/1/4/131454549/fc768ab7a21b3e.pdf
    • http://files.gardentogourmet.com.au/uploads/1/3/0/7/130776861/24d662f0fc96c78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/77494041839.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/yield_strength_and_tensile_strength.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/jatizenajoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/80395770729.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/7296738286.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/2243296950.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/nejowege.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/675021029.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/zoxux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/81624182509.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/citation_apa_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/11017163263.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_off00006120.bin
c8188b430f8ac342443a842d450f328ed3c8f1e51e7ca010840329a4a27cd0c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5336 bytes
font_01_sfnt_off0000734c.bin
d79a1c30afeac087c4721e3bf8b4cad2dc92dcd95c68dab8a8cbcfa2ffe86a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 10180 bytes
font_02_sfnt_off0000963b.bin
ea05debc84432978f5027e022ed2c5e6d46c8d22ad885dd1d713b48d221fbe8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963B 6496 bytes

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