Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c19b7c86f4cc47…

MALICIOUS

PDF

70.4 KB Created: 2020-09-01 04:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24cc3ebf91cddd59c2fb69b5da3a603d SHA-1: 685efe07dbf6b0a1f708ca7178b4d85cb44dde42 SHA-256: 72c19b7c86f4cc47eb4d4494a5d5dd354d3adb8de2de923e7342b6dc8c537eb3
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to financial templates, suggesting a lure. The presence of numerous external links, many pointing to PDF files, indicates a link farm designed to distribute malicious content or manipulate search engine results.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=construction+cash+flow+forecast+template+excel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/628a76_b8f7e6b7c01d443eb5706a088ebed26d.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_6848c55aa2b44d14955d8fc3aa6f25d5.pdf
    • https://static.usrfiles.com/ugd/9e53d4_418f6a7137ac4648b147205d9b35f05c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/katepejaxugebiwonuja.pdf
    • https://cdn.shopify.com/s/files/1/0467/6003/4467/files/hormigon_armado_jimenez_montoya.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/carte_canal_du_midi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/46830415610.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/86319253887.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/76142011224.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/83878421742.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/nurejavutovonamavuxom.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/87370554881.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/segmentacion_de_mercado_philip_kotler.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/17218744397.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/celulas_falciformes_enfermedad.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_off0000d746.bin
66a809142b5c825177cb43718b98618a9e9868b20d271f1e0e02ce724f16210c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 5320 bytes
font_01_sfnt_off0000e948.bin
c3a7719def1504a19e20f4ab60864c374b1d06272c2359d435b32ca2b13f71e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 10260 bytes

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