Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab021e1fabeac1b…

MALICIOUS

PDF

73.4 KB Created: 2020-09-06 06:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debed48445d4e99d003a40a219d3170e SHA-1: d4846ff0ab5451e267c60cd0383a9a9f3fd6d023 SHA-256: 5ab021e1fabeac1b0b818f7892fc6f9cbf4199b3d3a77a0bdd59ec0a8361958b
154 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a college application form, suggesting a social engineering lure. The presence of numerous links and the malicious redirector indicate an attempt to drive traffic to potentially harmful content.

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.me/wix?keyword=south+west+gauteng+college+application+form+2017
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b148e5_86c0d828b1f7416db89e66fe8d42780e.pdf
    • https://static.usrfiles.com/ugd/70c1f8_d237b8e5275a4ddda3703f42a3a27c6d.pdf
    • https://static.usrfiles.com/ugd/8e1900_9c4a6207bab2433aa7d3d5c44b83011e.pdf
    • https://static.usrfiles.com/ugd/74a852_2961b27b2959439d8e2b47a1dc922937.pdf
    • https://static.usrfiles.com/ugd/35e1ce_7bd7503873d0419ea89196579d6638bd.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/73101890824.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/73234746074.pdf
    • https://cdn.shopify.com/s/files/1/0452/6188/1506/files/81085552530.pdf
    • https://cdn.shopify.com/s/files/1/0440/1908/9566/files/american_history_trivia.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/piselijirifobugajuvirira.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/dedezozigovijolijudijelak.pdf
    • https://static.usrfiles.com/ugd/46a5ae_3f60bde083c7427286196eab4ee6cde9.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_57a01ed59d9c43d5964814407547bdba.pdf
    • https://static.usrfiles.com/ugd/3be3a7_bd139880a1994647beddc6fc4f32bf3a.pdf
    • https://static.usrfiles.com/ugd/930050_49d4ea3b8f7141cab323b5f431963f37.pdf
    • https://static.usrfiles.com/ugd/df73ab_2ba98d07abf44bd0884204069c8c6751.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_off0000df73.bin
d95f60946bd6456a45b72d927aba908e85844f24f3dd3f31bf1eb95b26c9a273
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 6028 bytes
font_01_sfnt_off0000f3f5.bin
558822bf7a1325dfbd93f45fae4b59508a9c79c4f1e630a19d0f9cd0ec5442ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 10636 bytes