Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a39ba39a9eb0de0…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 17:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619cb4ce3513a1af0c0e8393976cccd8 SHA-1: b8015134aa303af8d4b3f0765e6dbc0c29c30f81 SHA-256: 0a39ba39a9eb0de08aec26ef3f4ddd817fff77d7a944ff80c9debf43bad1417a
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/wb?keyword=robotica%20industrial%20pdf%20livro, which is flagged as malicious. The document's structure and embedded links suggest an attempt to manipulate search engine results or lure users to malicious sites under the guise of providing 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.ru/wb?keyword=robotica%20industrial%20pdf%20livro
    • http://files.mrsdavisswghs.com/uploads/1/3/1/4/131406441/b5167d1b21061a.pdf
    • http://files.hockeyparentcoachdevelopment.com/uploads/1/3/0/9/130969801/ba509ec2.pdf
    • http://files.speakingyourbest.com/uploads/1/3/1/4/131453284/gawekuj.pdf
    • http://files.neonopen.org/uploads/1/3/0/7/130776745/7c31006ef4548c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/wawovuriv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/estrategia_comercial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/37074213909.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/87685281357.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7438/files/basic_econometrics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/misumuzipetegaxapazipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/91474109660.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/65783303924.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/fejogorifikabaziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/psychology_vocabulary_in_use_chomikuj.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_off000058ea.bin
ccecf5c433be7a1e95113278fefcf65349834db05c71365a9926d6db33ccb701
pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 5356 bytes
font_01_sfnt_off00006b35.bin
1bb6f8b2ec58f76a323fb2f4e0b0e99109151c06dcfe1cd5c014f2411b848621
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 12196 bytes