Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bdedc6e2496643…

MALICIOUS

PDF

40.7 KB Created: 2020-08-28 23:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37f66d00479827d785b2f53888cbd318 SHA-1: dc3eeeb92450d5a408935e89fcd21085a430b8f5 SHA-256: 60bdedc6e2496643ec244d2f4aebfcc8f6f44914cd61a3fe9d601cb35ac29ac6
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for video songs. This suggests an attempt to trick users into clicking the malicious link, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly suggest malicious intent.

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/wix?keyword=abhiyum+naanum+cut+video+songs+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6572/0486/files/3009628119.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/nededizinabozego.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/jonebomag.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f916a37441c4147a6c9d3dcfe085ef7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d85ffc7e1344a5ac97b1d8aeef9855.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20c8a843dca4c0fb47fb30996a38280.pdf
    • https://static.usrfiles.com/ugd/b8c837_1107cff6c33844f5a82bf5b9e8e08998.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52213360b5940f59a8611a098400615.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf9afa210ccd4576ace0f8eb31f8251d.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/wemebarirovaveler.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0407/files/sidufinanofez.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/galson_lab_analysis_and_sampling_guide.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_off00005196.bin
49751fc62613f3a5393ab669300ebe29db152a641afc9a5fc20213d5d4b85406
pdf-font-stream PDF embedded font (sfnt) at offset 0x5196 5696 bytes
font_01_sfnt_off000064d4.bin
0df7a3d9acc9474f0a6656a5128fc87c9667ef5b8150cf902cfeb4d9e8e86063
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 15504 bytes