Malicious PDF — malware analysis report

Static analysis result for SHA-256 0630c550476ed771…

MALICIOUS

PDF

48.9 KB Created: 2020-08-08 16:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245adc58513ce5db803da665000c1da6 SHA-1: 0def6c438d593ac86c6cb71f4f8495ca4d996adc SHA-256: 0630c550476ed7718fd874e2b0b68f6baf35121fd1131e9cf18cbc6c57e3e1f1
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for "Algebra 1 regents 2020 pdf", leading to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=algebra+1+regents+2020+pdf. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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=algebra+1+regents+2020+pdf
    • http://files.carrollcountyfarmersmarket.org/uploads/1/3/1/4/131406403/nurimewi_tuxana.pdf
    • http://files.mimoophoto.com/uploads/1/3/2/6/132680813/539b95f7ad4.pdf
    • http://files.kristinescreationsonline.com/uploads/1/3/1/6/131606890/wegekazapalopinen.pdf
    • http://nimoma.calloyd.com/uploads/1/3/2/8/132816202/9876371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/93503282408.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/7407839005.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/nubezijuxetunafaxumipub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/33664448750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/basotivoza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/tonilajumozegab.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/2160652391.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/52477901244.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8197/files/angustia_graciliano_ramos_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/zifaxunajazolaka.pdf
    • https://cdn.shopify.com/s/files/1/0436/4858/1782/files/76348863980.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_off00007e7b.bin
4df683b5238671850285b4fa24b8b1ee769dfdd6c6a43107de58f39e955f302f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7B 5664 bytes
font_01_sfnt_off000091d5.bin
baab6ef65edac4971b4c75aa81ab54e5ededd6bbe4b68413bf8c1cfb1dd7103d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D5 10868 bytes

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