Malicious PDF — malware analysis report

Static analysis result for SHA-256 722fa7d24e8a94b7…

MALICIOUS

PDF

60.1 KB Created: 2020-08-05 03:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3105f219b12801783ab5d61e64bb76a0 SHA-1: ae5c33ff30148ce2fd225e0fd90d29de877e2b9f SHA-256: 722fa7d24e8a94b705c33dd0e8c08a3756fd8b0103967df1a13e2ba80505c541
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body and embedded links are designed to appear as legitimate resources, likely to deceive users into clicking the malicious URL. The presence of many external PDF links indicates a link farm strategy, potentially for SEO manipulation or to obscure the malicious destination.

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=ielts+simon+reading+pdf
    • http://files.emilymcsherry.com/uploads/1/3/1/4/131410812/9677614.pdf
    • http://files.innerpath.space/uploads/1/3/0/7/130775182/936943.pdf
    • http://files.gemenvironmental.org/uploads/1/3/0/7/130775806/19ebae8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/lojinewasilatisoketazuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/guzukifimezajivajikovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/jubakenijiju.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/bible_story_book_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0437/5203/0357/files/vufune.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/66239852948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/sudoviwadarigavevuvoler.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/rimip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/mindful_breathing_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/nofaperekutuzumidiluda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/accounting_concepts_principles_and_assumptions.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_off0000ad4a.bin
6d92570a2d0c07919b987e2a662c1a6026ea398e989dd956a2c8869822a95fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4A 5296 bytes
font_01_sfnt_off0000bf34.bin
0e8a2d31f7a74df8376695e0580bb073a6c8e6535f2a53a039aea69aa4c8c738		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF34 10744 bytes

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