Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fd371617fe9aa4…

MALICIOUS

PDF

70.2 KB Created: 2020-08-30 02:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f4181171ffe85c5c1018b672a95e263 SHA-1: 01c8214aa761c586f16fc92dc2d6d71e71b9a5a0 SHA-256: 07fd371617fe9aa4aa7f5cb99471810f28ec7a738f31ba1bbb30f07644d4c3eb
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though partially obfuscated, contains a URL that points to a redirector, suggesting an attempt to lead the user to malicious content. The presence of a link farm further supports the malicious intent.

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.cc/wix?keyword=marsha+linehan+dbt+skills+training+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/50331494748.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/wotifumadawopelom.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/zezekobixijozaliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/tomubudevade.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/rilexukegapowabexawok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/wukix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/69721697997.pdf
    • https://static.usrfiles.com/ugd/26938b_ba6fa080570f41f9b36293d3be476955.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce2eb99890cb4ec88b7d458bb6da8de4.pdf
    • https://static.usrfiles.com/ugd/d94ae5_7bc18ebf545c449d9dd7cc3d0bea08f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_932a3e4dac5f4f908cf08eeffd8b4eb4.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_off0000d07f.bin
8445e9d12682f2dc4f4fb50885b3fcbf9ddbdfdf4820c2f58ba4a8326328bc2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 5448 bytes
font_01_sfnt_off0000e2d4.bin
e75261e2c86060c8a59ece88dbc06d9c29697b11220faf72e633c187c4d63623
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 12608 bytes