Malicious PDF — malware analysis report

Static analysis result for SHA-256 17032df3ceefcbfc…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 06:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347700aab5d8cc8efe842e8205800bff SHA-1: c0053fa2eb3c33fce8fed90dbb267bf5ad2985eb SHA-256: 17032df3ceefcbfcecf681d24a7ac170c4ff1c87cc0b54904f59cde1e184830b
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a search keyword. The document body, though heavily obfuscated, contains the malicious URL and appears to be disguised as a user manual. The presence of numerous external PDF links, many benign, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=smart+wristband+s2+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2845/3288/files/non_conformance_report_template_construction.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/retirement_planning_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/pebatape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5502/1223/files/97986471047.pdf
    • https://cdn.shopify.com/s/files/1/0437/2155/6122/files/exigence_in_rhetoric.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/96695448618.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/exercice_verbe_etre_et_avoir_imparfait.pdf
    • https://cdn.shopify.com/s/files/1/0462/6966/1335/files/authenticity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/bro_code_barney_stinson_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/24369145769.pdf
    • https://static.usrfiles.com/ugd/a1fb72_0339606b9bfb41ca94879aafe2964ced.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba2ad8aab49f4d098695ec919d7a9c1a.pdf
    • https://static.usrfiles.com/ugd/18f527_e55cf55566734c688fe7fc4f67d94608.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_off00005313.bin
25374074bc3077f0f2f324d176ddcd2debefbf26c90f02d55f84a6437d3e1e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5313 5436 bytes
font_01_sfnt_off00006577.bin
9662a9041fcbc3fa8160a05ea5a63a091bc8f66713314cae82b1123e674e22f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 10004 bytes

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