Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bcd4cdd916050b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 20:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f3428d4bc293aa4fc0309334da20dc SHA-1: c01ae4802ec496b00da8fdb51ccfa0f4eb6824c7 SHA-256: e2bcd4cdd916050b9a6c5682a12022d23f6c226c1f98a4257003162da7616051
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=ley+de+instituciones+de+credito+word'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document also contains a mass external PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0439/4732/7646/files/5598571492.pdf'. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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/wix?keyword=ley+de+instituciones+de+credito+word
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/5598571492.pdf
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/xezadexeromilezokipaja.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/27746542666.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/33718596008.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/8979282515.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3351/files/lithonia_2blt4_cut_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0463/2707/0881/files/balancing_chemical_equation_questions.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4702/files/57517751402.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/78288800609.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/ravarudixazupiraloxejuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/16806812816.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/aditya_hrudayam_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/revetusasuxajojisedaji.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_off00006617.bin
c2ca5a56c175855d3ecbf0cec8f697a3059124dff65fd18980d9883de2af0dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6617 4708 bytes
font_01_sfnt_off0000763b.bin
112991c224d2cb52175187106bc535cc06b8e5303ea46ee02d5577a1efbae9c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 11172 bytes
font_02_sfnt_off00009a9d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9D 4324 bytes