Malicious PDF — malware analysis report

Static analysis result for SHA-256 10184fac2d0d8a4e…

MALICIOUS

PDF

51.5 KB Created: 2020-08-19 10:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff7296ff459ea7fc7984cfc1cab18fd4 SHA-1: 5c5ad8ce825f7ff88e732ad757e46e27e667cd97 SHA-256: 10184fac2d0d8a4e118631296dd74837669bc759cafea7062d2216357b3145f2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting it is a meeting agenda template, likely a lure. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to further malicious content.

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/pify?keyword=lds+ward+council+meeting+agenda+template
    • http://files.harvestpfc.com/uploads/1/3/1/0/131070161/2689152.pdf
    • http://files.cornerstoneteen.org/uploads/1/3/1/3/131378899/japekefo-gogebe-fimire-tojosomuwarep.pdf
    • http://jilifome.aylesburylodge4534.com/uploads/1/3/1/6/131606027/ruzepobawo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/labaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/31753749267.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/zelefewesizizofezitoduki.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/51533486229.pdf
    • https://cdn.shopify.com/s/files/1/0428/0785/3223/files/update_android_apps_automatically.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/kudoxifis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/semujoluvazeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4337/files/27590576687.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/lidix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/fallout_new_vegas_vault_22_ignite_gas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.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_off00008bf1.bin
2437b3ab76d330ed82164b25996e5411acc8c7bafad86fc6ab5edc867e4f03e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 5428 bytes
font_01_sfnt_off00009e5d.bin
3f5dfb6b31764f34af7d2b12e9fd2de4e89fc9939f0996bee59f04a19e750ea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5D 10120 bytes