Malicious PDF — malware analysis report

Static analysis result for SHA-256 082de70634bfe7ee…

MALICIOUS

PDF

45.1 KB Created: 2020-08-25 11:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 455cc0fd5fab85eea8bae13188fa9c70 SHA-1: 7e3853fa3a2daeb213206cf250e252a3769c6e73 SHA-256: 082de70634bfe7ee9cc4432ca0fdf1bed7bb3c1db40d74877f0040c5c3580b8c
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the URL that triggered the redirector heuristic, suggesting a lure to external content.

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.com/pify?keyword=comparacion+entre+ciencias+formales+y+empiricas
    • http://files.throatslashtattoo.com/uploads/1/3/0/7/130739227/dosilinodigil.pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://files.battlecomicsllc.net/uploads/1/3/1/4/131408465/kuwod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/madevidobi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/juteguzesolowetujobug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/53326280780.pdf
    • https://cdn.shopify.com/s/files/1/0445/4796/5087/files/reiki_master_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/asclepius_wellness_new_product.pdf
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/83289667027.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/gefirilazaxukuvil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/ca_125_elevado.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kadugapokujopipewenarut.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/denonerifamotuwamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/fifosalubiwatilaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3063/files/lojalidosasivalufivemif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/misuzimojujanadijoremo.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_off00006112.bin
5167c5162d5ddaccde8766cbd371059cc1bca24864ac27b789ffa78243e280df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 5072 bytes
font_01_sfnt_off00007237.bin
4599aa8f710620685ae7eab134bc652eee7c159451c566cf181cc51560257520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 11336 bytes
font_02_sfnt_off00009738.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9738 4324 bytes

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