Malicious PDF — malware analysis report

Static analysis result for SHA-256 11154c6190587bc6…

MALICIOUS

PDF

49.0 KB Created: 2020-08-31 14:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b0fb88f995514f7e9e263018a88e688 SHA-1: 6c0bf1c095f604beb07d409b69e606d1a0cad514 SHA-256: 11154c6190587bc604da5766035cc36ef333d152379e7a8c37b536160badf7f5
154 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a visa application form, which redirects to malicious infrastructure. The ML classifier strongly indicates malicious intent, and the presence of numerous external links suggests a link farm designed to obscure the ultimate destination. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attempt.

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/wix?keyword=belgium+embassy+in+ghana+visa+application+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/0d2908_9262431c6ce944f28979c1a7b6c7e771.pdf
    • https://static.usrfiles.com/ugd/b910ae_053889f9425e4e73b497f459f77583f4.pdf
    • https://static.usrfiles.com/ugd/b52961_cd052529df164c319c2f596f62c61ddd.pdf
    • https://static.usrfiles.com/ugd/a43ec6_392e07b9d504499ab633bf230e0f3a72.pdf
    • https://static.usrfiles.com/ugd/4117a9_961662186a42425ab353ead5be61f8f7.pdf
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/42555054994.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/68907125906.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/joindre_des.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/general_comments_for_report_cards.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_4af9a8031933405ab637d245d8464115.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ee590db22b0406ab72ad62683a0418b.pdf
    • https://static.usrfiles.com/ugd/e42ee3_11e984c5333542aaa9280e5e2c187143.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dec77c6d46b470ea3f56922e1c7dda0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2968bec767fc414990ff7115e05a105f.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_off0000710b.bin
ad8d2decbc31ce9df2e667448cdf3aa67a56fcdca27bab91604c37aec1296f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710B 5664 bytes
font_01_sfnt_off0000842e.bin
34dcef34eabffb7a43ed29994931129dee8bde4139c455723cb541351aef4455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842E 10512 bytes
font_02_sfnt_off0000a833.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA833 4324 bytes

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