Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e2b27e0364e25a…

MALICIOUS

PDF

52.0 KB Created: 2020-08-31 05:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c15799c5c7cb087113bce181a133a37 SHA-1: c744890824261e8795a9ab1f3b71fd5619e79bda SHA-256: 08e2b27e0364e25a0bb48376c3fecb8286bcf1ad5866a9def9cab49d1ff37c68
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading zip files and a URL that appears to be part of a link farm. The presence of a malicious redirector suggests an attempt to lead the user to harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=tupac+albums+download+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3bf302_2ff62ee5fa364ec4abf733dec97f8c0b.pdf
    • https://static.usrfiles.com/ugd/5360f8_3dcf6bc7f6f940b399dc2b27ae253f3e.pdf
    • https://static.usrfiles.com/ugd/95089d_6e0a3a8c2dfb41188f0f620a6923ea5f.pdf
    • https://static.usrfiles.com/ugd/b85eb0_6775edf032164431a656dfb147be14c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25af426ad04839a74d89c065067bb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebc206580f4e41639b32a3acb87238f6.pdf
    • https://static.usrfiles.com/ugd/33a2e4_b6d9baf655194732bb52d3c81d090885.pdf
    • https://static.usrfiles.com/ugd/b8c837_1906bb1a8ecc41209f4824dbbc3168b9.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/frases_verbales_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/zubuxoxopekosebulamadiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/numilemevogemuliwopin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/reset_safari_9.pdf
    • https://static.usrfiles.com/ugd/b7ed05_4b86897daa4348809e9706f6ea02d1eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_470c600901784a6480168fd239ba6a75.pdf
    • https://static.usrfiles.com/ugd/6c032c_dca9773b64d4466d85b7fc0c779c029b.pdf
    • https://static.usrfiles.com/ugd/ae059d_b679dac0431f4ab7a730f3d0c634d27f.pdf
    • https://static.usrfiles.com/ugd/5926b4_4a297bbd1dea4638935d15c241f56cfa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007de8.bin
a620051dd17930c2a785684ee8dd059db2e677b95847e8f53a6ac1634f2c2a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 5356 bytes
font_01_sfnt_off00009018.bin
1a8c1fbf9a10d399f415228a7d92934209def084431c06abba8a4087661d0706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9018 15840 bytes

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