Malicious PDF — malware analysis report

Static analysis result for SHA-256 68793e1c27af8801…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 04:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414d8dddcd3bf4d96a47bee4ee4ee199 SHA-1: 7b92db0f89e65d914f4e64e3f58d96b2b4347054 SHA-256: 68793e1c27af8801acb0410f977c66d5f7539b7eda144234bd75907f9c6b78af
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent URL identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=all+blues+soloing+for+jazz+guitar+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e23fbb_19e353aaa351433ab8e730077a6e224b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4c5a4c552b24ff7ade7d7a220749a44.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_9b00726643e440599525909693ae740f.pdf
    • https://static.usrfiles.com/ugd/47b1e8_4a922b658d1149a7b4f95aeb1208c830.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/a298ce_454316ef0f674eb2aaffef0f80abd7a9.pdf
    • https://static.usrfiles.com/ugd/97aff7_26ae3dd6fe3d4a35b991653b5d711998.pdf
    • https://static.usrfiles.com/ugd/3bca44_73ba45e3518645eb872a67550657cb3f.pdf
    • https://static.usrfiles.com/ugd/5b9a87_3b3dd6e3110b4e84b2f14f7cb21a46cc.pdf
    • https://static.usrfiles.com/ugd/f65175_09697fb35bfd4d20bed1a5301f5aad92.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/31249126533.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/nest_com_e74.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/lazexavilelivanipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/16945020691.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0439/1577/2059/files/44712028641.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_off00006ad8.bin
0cc26dabf0e459a40b86f8f56633e5c8fe09722c605f79395dcacd6e73fd3e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD8 5464 bytes
font_01_sfnt_off00007d79.bin
a924fa7ad85d1fa1d2cf092b57525b201f676a951fdbcbe740720948c7a8d090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 10728 bytes

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