Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5301c8f8410c8c…

MALICIOUS

PDF

59.1 KB Created: 2020-08-09 19:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929c3cbf5416db5d7dfcd27412820552 SHA-1: a80ae4078601496808bb58bb7046642a9f5975f4 SHA-256: 0a5301c8f8410c8c0e73d7731fbfdc55e29aaf80da660b8d7460569c1ef5f060
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent link, https://ttraff.cc/pify?keyword=from+old+public+administration+to+new+public+management+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating it's a primary lure. The ML classifier strongly flagged this PDF as malicious.

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=from+old+public+administration+to+new+public+management+pdf
    • http://sixor.nabc-sc.org/uploads/1/3/0/7/130740522/jepakubirexodu_xemadaposijarod.pdf
    • http://files.kidsoutdoorliving.com.au/uploads/1/3/1/4/131407547/rofegowotaver_jutale_gadesi.pdf
    • http://files.jshseurope.org/uploads/1/3/0/7/130740429/9ee7f08fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/70607626907.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/15572030490.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/lasazifesega.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/93528161383.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/jedubamimanemebudazam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/21729930874.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/lovolilifosesuzan.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/92032585325.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/38226191550.pdf
    • https://cdn.shopify.com/s/files/1/0433/8204/6869/files/canara_bank_rtgs_neft_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/university_physics_with_modern_physics_14e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b47.bin
86d59e6e3a86b6dd19eb3f94c2c20b109fae20646e1152010c826abcaf6f608c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B47 5544 bytes
font_01_sfnt_off0000ae15.bin
94ef463ce5eddba8b517da2163f7f1c871459231b9d32615a4e96742a728d003		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE15 10248 bytes
font_02_sfnt_off0000d0eb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 4324 bytes

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