Malicious PDF — malware analysis report

Static analysis result for SHA-256 1178830628294f37…

MALICIOUS

PDF

45.2 KB Created: 2020-07-31 05:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9aef0c95eccd9009c203342cfb34d28 SHA-1: 6ee5314c79988f56873b91141f34ea7045a6e921 SHA-256: 1178830628294f37613aaa702ef7392ede7b3550d5abaeb59ab8d2aa1909bfc1
154 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector URL, indicating an attempt to direct users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a malicious document designed to lure users, likely for phishing or malware delivery.

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=calendario+2020+argentina+con+feriados+pdf
    • http://files.africangoodwillnetwork.com/uploads/1/3/0/8/130874543/8430650.pdf
    • http://files.lehoangbichphuong.com/uploads/1/3/0/8/130873894/wobesaritaniwus_wimevezozobos_nivesemapuruke_gufejin.pdf
    • http://files.hotspurschoolofdefence.com/uploads/1/3/2/6/132696080/3912319.pdf
    • http://files.peacefulthoughtstherapy.com/uploads/1/3/1/3/131398099/ginevelul-xedanezamedep-wumusimuvixi.pdf
    • http://files.jchschoir.com/uploads/1/3/1/4/131409442/cb594a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/kidudixasojuwikijetudekam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/12257108924.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/rirogidorupasajoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/44141858526.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/gubiluw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/6234341778.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/30981442758.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/ketulemurapadom.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/15701729291.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/17950502785.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/xoxepugamuxigo.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_off000070a7.bin
7de02d7f07abae0bf0105f2c4d323432e0d2697e293a1ac44916454d496bb079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 5408 bytes
font_01_sfnt_off0000831b.bin
146ee363a1e1bd9e17e1bc6f941d386d49b2febd744c18f6381f0a8597c333de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 10600 bytes

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