Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f8344aaf26be5b…

MALICIOUS

PDF

62.9 KB Created: 2020-08-21 19:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c8868ffd51efb3cd5ff9a0ca8674a3 SHA-1: f1e9abc3cb5b50ef61588195eb93fc3a48cac952 SHA-256: 76f8344aaf26be5beb147d46d5b48a326b8aee349d8dc2080194b8b483e8d40d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a study guide, aiming to trick users into clicking it. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the embedded URL pointing to 'ttraff.cc' strongly indicate a phishing or redirection attempt. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic or distribute malicious content through numerous links.

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=nj+driver%2527+s+permit+test+study+guide
    • http://jokezujid.littlemenaceclothing.co.uk/uploads/1/3/1/0/131070374/juxur.pdf
    • http://files.detailprosmobile.com/uploads/1/3/0/8/130813458/1839612.pdf
    • http://ruvip.santeco-realty.com/uploads/1/3/0/7/130740051/629aa446d66.pdf
    • http://files.pantoffelkinovideo.com/uploads/1/3/0/9/130969172/a18312ccbc8.pdf
    • http://files.corvinoperformance.com/uploads/1/3/1/1/131164081/fawiki_wuzeduvak_pezemagofezu_kigiliji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/lumozareradutututa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/35157094506.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/dewanamijipoladavo.pdf
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/blade_banshee_breeding_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/77731197661.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/depfile_premium_password.pdf
    • https://cdn.shopify.com/s/files/1/0453/8499/0888/files/agronomy_of_field_crops_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8671/files/jamaica_fire_brigade_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/piazzolla_tango_etudes_saxophone.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/bibonofos.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_off0000b785.bin
ff157c0fec90706c775978939726a2540b92b61939001292704c8476651e375f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB785 5280 bytes
font_01_sfnt_off0000c988.bin
0a1a63da9e020a389e8a18a44288c5ece80041dde7581b03eda3338850a5bd30
pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 10864 bytes