Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab44b50504983fd…

MALICIOUS

PDF

40.8 KB Created: 2020-08-24 23:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb5cc5aa8ffb356c45bddb521c900359 SHA-1: a54347ef4885342bfa20ffb3f251370a9bf42c34 SHA-256: dab44b50504983fd3855d073cf29a673474eebe2a8561dca7484e05407944f89
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a redirector to 'ttraff.com', indicating a phishing or scam attempt. The document body, though obfuscated, contains the string 'Mozilla browser for mac', likely a lure to entice users to click the malicious links. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=mozilla+browser+for+mac
    • http://mivirif.trophiesmedals.co.uk/uploads/1/3/1/4/131437886/edc4551.pdf
    • http://files.bodybycookie.com/uploads/1/3/1/0/131070336/gisupuwevavokigu.pdf
    • http://zodumaku.basevillageforgifted.com/uploads/1/3/1/0/131070317/905369.pdf
    • http://files.633stclair.com/uploads/1/3/1/4/131437037/2000501.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/67722552038.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/kaplan_nursing_entrance_exam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/fapukowodotidusavikafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/46083385040.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/36175454974.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/kepadufananoxipekokafasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/birupofomekojugubaja.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/agile_methodology_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/7758/1465/files/baby_shower_boy_invitations_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7079/files/aumento_de_masa_muscular_nutricion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006021.bin
cc8f9a160fd034b126ec22673dc0a9a06f71275192fd81088390c0175a2f75be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5316 bytes
font_01_sfnt_off0000723f.bin
bd06b8cf6b0d5022c833abac40187d9295c739a5b48744aac507bf8a72d6f74d
pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 10764 bytes