Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1882b15e4bcaa4b…

MALICIOUS

PDF

40.2 KB Created: 2020-08-17 14:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37bf6a194607dd114e0ee1962a5b815 SHA-1: 29965772efbae84a80c86067e4217289ab429302 SHA-256: b1882b15e4bcaa4b019acb50aedaea1de0815dae84bd79202c3605f4552f69cb
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to flooring. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a lure to external malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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=vinyl+flooring+sheets+chennai
    • http://files.suzannemcnallyphotography.com/uploads/1/3/1/4/131407164/527375.pdf
    • http://risulutaz.ahbuildingservices.com/uploads/1/3/1/0/131070571/508480.pdf
    • http://files.upliftedforlife.com/uploads/1/3/0/9/130969352/6836378.pdf
    • http://files.carolinapumpworks.com/uploads/1/3/1/6/131637125/56cc827.pdf
    • http://files.smokefreebyattrition.com/uploads/1/3/0/7/130738593/73465e2fa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/lovulopegabelalenozig.pdf
    • https://cdn.shopify.com/s/files/1/0447/7576/8221/files/produksi_biogas_dari_kotoran_sapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0642/files/ministry_of_finance_indonesia_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/define_toddler.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/sweet_16_bracket_printable.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/amisys_advance_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/4889/8458/files/cartographic_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/galvanometer_construction_and_working.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a3.bin
5ce0e9ee06fb81e49446f0e318f857d2c9343fb45f45ab94d6fbe5d00e4e2b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5208 bytes
font_01_sfnt_off0000725f.bin
f35c361549573376536baa5174061e04d8df8582e9343763a40b51ff76de2f83
pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 9920 bytes