Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f62226504ebf10…

MALICIOUS

PDF

42.2 KB Created: 2020-08-01 09:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9308c24290660d6d07eedb6fc410ae88 SHA-1: adbd9c1398d0ab688a62d04d6d38b5f3c2ee12a3 SHA-256: 66f62226504ebf1063e9d373480058be3951c620f47638cf9a6253e80517d7a4
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains references to 'Youtube to mp3 playlist' and the malicious URL, suggesting a lure for potentially unwanted content or further malicious downloads. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=youtube+to+mp3+playlist
    • http://files.okvhpa.org/uploads/1/3/2/7/132740424/fenujevefupe-rerovu-kabosugafadef.pdf
    • http://files.armelleaurelien2019.com/uploads/1/3/1/6/131606256/75252cd5de.pdf
    • http://files.mrescience.net/uploads/1/3/1/6/131606165/jeparafi-xisiweraneg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/the_jaunt.pdf
    • https://cdn.shopify.com/s/files/1/0434/0580/3687/files/wilozalopesewifajogito.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/84046944417.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/rawajiginitibegimebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/kozokurajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/19040955770.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/bivupedukelalelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/suzomoxufesezogut.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/mapenajosedewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/78945829223.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_off00006630.bin
a22bc20bbb83745bfa57467bc0a84962f4feacdb2d7296fd5816ac4276a22856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 5236 bytes
font_01_sfnt_off000077fa.bin
d2ab620128ad9c2c02adae218246fc2316c796ce8104267a36207cabbb13b93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 10476 bytes

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