Malicious PDF — malware analysis report

Static analysis result for SHA-256 089e52a4dbd9a341…

MALICIOUS

PDF

67.9 KB Created: 2020-08-14 06:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380989de2c9885dc971b1eedc31ca2bc SHA-1: c1c8d32007c10ef86cc957010dd0e33300b1fc60 SHA-256: 089e52a4dbd9a3410a98e7550fd99b9d027f09897eb19e24ef29a5bb9000cf76
154 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 look like a search result for 'basic sql queries with examples pdf'. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=basic+sql+queries+with+examples+pdf
    • http://files.customer1stelectrics.com/uploads/1/3/1/3/131381109/duruwamuko.pdf
    • http://files.tigerseyejournal.com/uploads/1/3/0/8/130874197/sapemimulen_zakib.pdf
    • http://files.mslaneapgov-econ.com/uploads/1/3/2/3/132302941/046bcfc32a2eac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/kudexowar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/67438738386.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/27307265788.pdf
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/acdsee_ultimate_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tunamowari.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/ninepegewufagudubidir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/runuwifasozesewonavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/fobibowapirimedoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/realismo_magico_libros.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/74720981001.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/sigagun.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_off0000c9ef.bin
2d37c19f18c9138b0a8d41da7b7d27cf634c1c62bc3723ab3061ca64e07bf3c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EF 5728 bytes
font_01_sfnt_off0000dd55.bin
4c575feee86ea9e4b36a86507a677ec11d6b17778fd088ecae442982b966c5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 10872 bytes