Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc3064c43610bda…

MALICIOUS

PDF

56.5 KB Created: 2020-08-06 19:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943af31ad7882292913cc31f420f7a02 SHA-1: ed611111e67e0be22617038d5a19bb205b1bb4aa SHA-256: 5cc3064c43610bdaf822a0ce5aa0735bf120dc2b65843bdf2af6f188d957b319
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL that redirects to malicious infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL, suggesting the document's purpose is to trick users into visiting this malicious site. The ML classifier strongly flagged this PDF as malicious.

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=aula+internacional+1+nueva+edicion+soluciones+pdf
    • http://vexubunuv.sterlingsoccer.org/uploads/1/3/2/6/132680813/9215419.pdf
    • http://files.newparanormalinvestigators.com/uploads/1/3/0/9/130969653/8380982.pdf
    • http://files.yesternoir.org/uploads/1/3/1/3/131384249/tamezabunozape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/pafazisiwukumebateliwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/xupizow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/vilofuxitowavonarilazaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/pelelemopoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/wazawosugefuxudinuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/5150/0188/files/94244516262.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6697/files/prefix_and_suffix_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/40752746476.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0762/files/92474620259.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/35307434970.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/96769442114.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_off000099a3.bin
14e1e8dc30187f714f2dfd2f43a9aff8627202682b1927671ec3ccb18f3e8b45
pdf-font-stream PDF embedded font (sfnt) at offset 0x99A3 5252 bytes
font_01_sfnt_off0000ab9e.bin
b13d3cedde64436f31f978b29ab970ae83ddbc1dc21742b94f5d73bcde18c9d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9E 12172 bytes