Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee8495b956de35e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 11:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2cb6bb7297e4519587fd4264495536 SHA-1: 06694ae63cbc415626cfc71bf837b1d2acd17aba SHA-256: 5ee8495b956de35eedddcc107ef8fc76237c6f538925afea46b91f478817e204
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, likely intended to lead the user to a phishing or malware download site. The document body, though heavily obfuscated, contains a URL that appears to be a lure for technical documentation. The presence of numerous other PDF links further suggests a link farm or redirection strategy.

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.com/wix?keyword=abaqus+script+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_db432302575d4badb9a9a30699d2c826.pdf
    • https://static.usrfiles.com/ugd/b8c837_8656f02880364090bf7434a8ffa19d66.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebc31fccf7147f5b53ae8a6e3b817d9.pdf
    • https://cdn.shopify.com/s/files/1/0437/6281/1031/files/6438292538.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/26575792222.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/49004799413.pdf
    • https://cdn.shopify.com/s/files/1/0463/3713/0658/files/herbalism_guide_cataclysm.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/taluwut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/xoneguzafagarerazesovafev.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/4157651546.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/mifinebekeno.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/rodovunamipori.pdf
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/ball_mill_troubleshooting_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/airline_simulator_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/wasuxun.pdf
    • https://cdn.shopify.com/s/files/1/0436/9609/5397/files/fetal_sonography_report.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_off000063ba.bin
b6ba74112f881d2ec5e07fcfdbf76ed15ee87bcebd0df6268e82837f66bd7049
pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5464 bytes
font_01_sfnt_off00007644.bin
076f2fabca799d3929f45732fef3bcef73ba36e23fada7a82ab843a5d3a8e866
pdf-font-stream PDF embedded font (sfnt) at offset 0x7644 13304 bytes