Malicious PDF — malware analysis report

Static analysis result for SHA-256 1362f495f90ce2e8…

MALICIOUS

PDF

187.3 KB Created: 2020-08-12 13:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3b31fc62055d82560291b5ab2a0773 SHA-1: cff58d7cde2432e61f8eb6d9c6e634234fc3f780 SHA-256: 1362f495f90ce2e8d74905b667df5f2c4b52cde1712b7924423b01515c8f5908
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains the same redirect URL, suggesting an attempt to lure the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/wb?keyword=antibody%20engineering%20pdf
    • http://jivemub.fredhight.com/uploads/1/3/0/8/130874254/6729604.pdf
    • http://files.leswilkesphotographer.com/uploads/1/3/1/3/131381464/3621288.pdf
    • http://bavelema.freckledsteps.com/uploads/1/3/1/3/131380600/tuxiwifadaxev_bapezopef_didixilesorofu_kevikituberoped.pdf
    • http://files.bdisigns.com/uploads/1/3/1/6/131606121/julox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/vomikomijigamar.pdf
    • https://cdn.shopify.com/s/files/1/0436/9154/0634/files/64030478345.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/gatodofezovixopenijopove.pdf
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/ain_t_misbehavin_eb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/dafakeposonorarurad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66264102559.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/40236598938.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/26907399362.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/12414486026.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/vuwuzepib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/zafixunuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/93109076548.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_off00028a6d.bin
3cd1564b4a9dfbd433ce262e4fc6c55c49c6a2c141423f282669502bd078dc65
pdf-font-stream PDF embedded font (sfnt) at offset 0x28A6D 4808 bytes
font_01_sfnt_off00029ace.bin
040d1aebd3ffcde67df7cae16a3dfb9e69ac758ba9f4fd9dbfe34224cad4b364
pdf-font-stream PDF embedded font (sfnt) at offset 0x29ACE 17508 bytes
font_02_sfnt_off0002d0cd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0CD 4324 bytes