Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e99c461ae18f8b9…

MALICIOUS

PDF

38.7 KB Created: 2020-07-08 17:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a353a5d87fb788baf5e571dc9e3f72e SHA-1: 3c5a2d4e82fcdb0333b96e841362fb27e07b8c73 SHA-256: 9e99c461ae18f8b9401149131b54fc37df5650040327b234088ca8d14f64a172
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to lure users into clicking on seemingly benign 'camera scanner to pdf' links. These links redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this document. The document body and extracted URLs suggest a phishing or redirection campaign.

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/wb?keyword=camera%20scanner%20to%20pdf%20-%20tapscanner
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • http://files.thelivingpoint.com/uploads/1/3/1/3/131383383/towogemuripexuxe.pdf
    • http://files.mwahistory.com/uploads/1/3/1/4/131406433/756111.pdf
    • http://files.tjerkotten.com/uploads/1/3/0/7/130775025/3744872.pdf
    • http://files.ccflores.com/uploads/1/3/2/7/132740525/8837475.pdf
    • http://files.wacc.co.nz/uploads/1/3/1/4/131408741/kebopidonetip_wurirewem.pdf
    • https://tajejow.files.wordpress.com/2020/06/kowitamejona.pdf
    • https://xopipovezeru.files.wordpress.com/2020/07/dapoxewibovotifebasaboni.pdf
    • https://duwadunox.files.wordpress.com/2020/06/pitalew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004321.bin
fdc0117dae0606ab9b8ba2837900b3cfa3373cf5810bb902f07aacf609f27b08
pdf-font-stream PDF embedded font (sfnt) at offset 0x4321 5064 bytes
font_01_sfnt_off00005441.bin
7e3f1046178d33d8b7f67602a25a9997ed8d484d56125bcf2162a15d77ee9ea9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5441 10276 bytes
font_02_sfnt_off00007624.bin
845133db8f25f0658a6186c002b77e4678385e845b062c84138a48b26b9535df
pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 16448 bytes