Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c5daed7a0da987…

MALICIOUS

PDF

43.6 KB Created: 2020-09-17 13:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0263fbba5a4d8399d55be85f30277e SHA-1: d0cbf6227adf47c40854f67103bf356f98589b0f SHA-256: 15c5daed7a0da987bcc5b414eed0ce49685a9b19b4bb6b715fc7987ab496b380
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests an attempt to direct users to potentially harmful websites, possibly for phishing or to download further malicious 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.link/wix?keyword=warrior+cats+codebreakers
    • http://files.level2development.com/uploads/1/3/1/6/131606666/kuzuja-bezapadadosepe-burobo-rezegesagak.pdf
    • http://vumagal.hillcountrycommunicators.org/uploads/1/3/1/6/131606027/neliwapazasukadixodo.pdf
    • http://files.buyers-club-solar.com/uploads/1/3/1/3/131398131/9206617.pdf
    • http://files.tlcbangor.com/uploads/1/3/1/4/131409709/655201d22dc70.pdf
    • http://fijunik.charlesrivercenterroadrace.com/uploads/1/3/1/4/131453293/012f4c4ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/kamifuromunote.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/ruwufurodibobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/19959066170.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/beaconmedaes_zone_valve_box.pdf
    • https://f48cc340-b9b3-4603-94b6-061f5fd22c07.filesusr.com/ugd/76aeb6_ec82e2de9f784f96bb5e9fefa05fb95a.pdf?index=true
    • https://e0a5ee86-39b8-4cfc-8d9d-3fc4a5cf7317.filesusr.com/ugd/d902bb_f240da731f854f22b07c69ccdf745a7d.pdf?index=true
    • 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_off00006d5a.bin
3c802d089c7259ed2f8f59da3cedc64c240e001091c91cc17a8d5c368a8f026e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 5116 bytes
font_01_sfnt_off00007ede.bin
d5c244e2ad137cd5a6642833afc8748048aa337b67919347a05e92aeded0c944
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDE 10112 bytes