Malicious PDF — malware analysis report

Static analysis result for SHA-256 7686a613544c8c2c…

MALICIOUS

PDF

45.6 KB Created: 2020-07-28 16:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bc230d3c78db31aa95fc187c465a677 SHA-1: 7f7e7bfdbb07ed792594971549604b60250329da SHA-256: 7686a613544c8c2c43e7c4651e95b498901354e5dc6e3746b6c221fe7fa39d54
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a movie guide. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

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=evolution+movie+parent+guide
    • http://files.brickstoremuseumshop.org/uploads/1/3/0/8/130874238/327568677c6d646.pdf
    • http://files.personalhibachichef.com/uploads/1/3/1/3/131380591/fopopodazodaze.pdf
    • http://files.regansmotivatedfitness.com/uploads/1/3/0/8/130874369/b185d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/58060743363.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/36637868837.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/wukixodiluker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/ruzivow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/9373109573.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/rulezeputemiravufabezez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/97666732110.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/gekikanixonasamifemulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/61935721474.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_off000074fc.bin
6ff0688c8c57565a46e5b299bff59b8eee4e887938cb7de219d09a919b34bc07
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 5000 bytes
font_01_sfnt_off000085e5.bin
0a82ed420e03c0e8d4dc772a5b07ccba14ab46b566b4ec1aea02c3304b1f0581
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E5 10344 bytes